cc/trees/layer_tree_host_unittest

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This source file includes following definitions.
fallback_context_works_
LoseContext
CreateContext3d
CreateFakeOutputSurface
CreateOffscreenContext3d
OffscreenContextProvider
PrepareToDrawOnThread
CommitCompleteOnThread
DidFailToInitializeOutputSurface
TearDown
ExpectCreateToFail
first_initialized_
BeginTest
DidInitializeOutputSurface
AfterTest
DidCommitAndDrawFrame
InvalidateAndSetNeedsCommit
NextTestCase
WillBeginTest
BeginTest
CreateOutputSurface
DidInitializeOutputSurface
AfterTest
SetupTree
InvalidateAndSetNeedsCommit
DrawLayersOnThread
AfterTest
TEST_F
TEST_F
TEST_F
TEST_F
TEST_F
TEST_F
times_initialized_
BeginTest
CreateFakeOutputSurface
DidInitializeOutputSurface
DrawLayersOnThread
AfterTest
SetupTree
BeginTest
DrawLayersOnThread
AfterTest
first_initialized_
BeginTest
DidInitializeOutputSurface
CommitCompleteOnThread
AfterTest
num_commits_
SetupTree
BeginTest
PostEvictTextures
EvictTexturesOnImplThread
DidCommitAndDrawFrame
CommitCompleteOnThread
DidInitializeOutputSurface
AfterTest
TEST_F
TEST_F
TEST_F
TEST_F
TEST_F
TEST_F
TEST_F
TEST_F
TEST_F
TEST_F
TEST_F
times_to_lose_on_end_query_
CreateContext3d
SetupTree
BeginTest
DrawLayersOnThread
DidInitializeOutputSurface
AfterTest
num_commits_
SetupTree
BeginTest
DidActivateTreeOnThread
AfterTest
EmptyReleaseCallback
SetupTree
BeginTest
CommitCompleteOnThread
PrepareToDrawOnThread
CreateFakeOutputSurface
DidCommitAndDrawFrame
AfterTest
BeginTest
DidInitializeOutputSurface
DidCommitAndDrawFrame
AfterTest
PrepareToDrawOnThread
DrawLayersOnThread
SwapBuffersOnThread
InitializeSettings
BeginTest
PrepareToDrawOnThread
InitializedRendererOnThread
DrawLayersOnThread
SwapBuffersOnThread
AfterTest
InitializeSettings
BeginTest
PrepareToDrawOnThread
DidInitializeOutputSurface
InitializedRendererOnThread
DrawLayersOnThread
SwapBuffersOnThread
AfterTest
InitializeSettings
SetupTree
BeginTest
AfterTest
DidInitializeOutputSurface
BeginTest
AfterTest
CommitCompleteOnThread
InitializeSettings
BeginTest
AfterTest
PostStepCompleteToMainThread
PostLoseContextToImplThread
StepCompleteOnMainThreadInternal
CommitCompleteOnThread
DidActivateTreeOnThread
StepCompleteOnMainThread
StepCompleteOnImplThread
test_id1_
StepCompleteOnMainThread
StepCompleteOnImplThread
StepCompleteOnMainThread
CommitCompleteOnThread
WillActivateTreeOnThread
DidActivateTreeOnThread
TEST_F
TEST_F
StepCompleteOnMainThread
DidSetVisibleOnImplTree
StepCompleteOnImplThread
layer_
SetupTree
BeginTest
DidCommit
CommitCompleteOnThread
DidInitializeOutputSurface
AfterTest
// Copyright 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "cc/trees/layer_tree_host.h"

#include "base/basictypes.h"
#include "cc/layers/content_layer.h"
#include "cc/layers/delegated_frame_provider.h"
#include "cc/layers/delegated_frame_resource_collection.h"
#include "cc/layers/heads_up_display_layer.h"
#include "cc/layers/io_surface_layer.h"
#include "cc/layers/layer_impl.h"
#include "cc/layers/painted_scrollbar_layer.h"
#include "cc/layers/picture_layer.h"
#include "cc/layers/texture_layer.h"
#include "cc/layers/texture_layer_impl.h"
#include "cc/layers/video_layer.h"
#include "cc/layers/video_layer_impl.h"
#include "cc/output/filter_operations.h"
#include "cc/test/fake_content_layer.h"
#include "cc/test/fake_content_layer_client.h"
#include "cc/test/fake_content_layer_impl.h"
#include "cc/test/fake_delegated_renderer_layer.h"
#include "cc/test/fake_delegated_renderer_layer_impl.h"
#include "cc/test/fake_layer_tree_host_client.h"
#include "cc/test/fake_output_surface.h"
#include "cc/test/fake_output_surface_client.h"
#include "cc/test/fake_painted_scrollbar_layer.h"
#include "cc/test/fake_scoped_ui_resource.h"
#include "cc/test/fake_scrollbar.h"
#include "cc/test/fake_video_frame_provider.h"
#include "cc/test/layer_tree_test.h"
#include "cc/test/render_pass_test_common.h"
#include "cc/test/test_context_provider.h"
#include "cc/test/test_shared_bitmap_manager.h"
#include "cc/test/test_web_graphics_context_3d.h"
#include "cc/trees/layer_tree_host_impl.h"
#include "cc/trees/layer_tree_impl.h"
#include "cc/trees/single_thread_proxy.h"
#include "gpu/GLES2/gl2extchromium.h"
#include "media/base/media.h"

using media::VideoFrame;

namespace cc {
namespace {

// These tests deal with losing the 3d graphics context.
class LayerTreeHostContextTest : public LayerTreeTest {
 public:
  LayerTreeHostContextTest()
      : LayerTreeTest(),
        context3d_(NULL),
        times_to_fail_create_(0),
        times_to_lose_during_commit_(0),
        times_to_lose_during_draw_(0),
        times_to_fail_recreate_(0),
        times_to_fail_create_offscreen_(0),
        times_to_fail_recreate_offscreen_(0),
        times_to_expect_create_failed_(0),
        times_create_failed_(0),
        times_offscreen_created_(0),
        committed_at_least_once_(false),
        context_should_support_io_surface_(false),
        fallback_context_works_(false) {
    media::InitializeMediaLibraryForTesting();
  }

  void LoseContext() {
    context3d_->loseContextCHROMIUM(GL_GUILTY_CONTEXT_RESET_ARB,
                                    GL_INNOCENT_CONTEXT_RESET_ARB);
    context3d_ = NULL;
  }

  virtual scoped_ptr<TestWebGraphicsContext3D> CreateContext3d() {
    return TestWebGraphicsContext3D::Create();
  }

  virtual scoped_ptr<FakeOutputSurface> CreateFakeOutputSurface(bool fallback)
      OVERRIDE {
    if (times_to_fail_create_) {
      --times_to_fail_create_;
      ExpectCreateToFail();
      return scoped_ptr<FakeOutputSurface>();
    }

    scoped_ptr<TestWebGraphicsContext3D> context3d = CreateContext3d();
    context3d_ = context3d.get();

    if (context_should_support_io_surface_) {
      context3d_->set_have_extension_io_surface(true);
      context3d_->set_have_extension_egl_image(true);
    }

    if (delegating_renderer())
      return FakeOutputSurface::CreateDelegating3d(context3d.Pass());
    else
      return FakeOutputSurface::Create3d(context3d.Pass());
  }

  scoped_ptr<TestWebGraphicsContext3D> CreateOffscreenContext3d() {
    if (!context3d_)
      return scoped_ptr<TestWebGraphicsContext3D>();

    ++times_offscreen_created_;

    if (times_to_fail_create_offscreen_) {
      --times_to_fail_create_offscreen_;
      ExpectCreateToFail();
      return scoped_ptr<TestWebGraphicsContext3D>();
    }

    scoped_ptr<TestWebGraphicsContext3D> offscreen_context3d =
        TestWebGraphicsContext3D::Create().Pass();
    DCHECK(offscreen_context3d);
    context3d_->add_share_group_context(offscreen_context3d.get());

    return offscreen_context3d.Pass();
  }

  virtual scoped_refptr<ContextProvider> OffscreenContextProvider() OVERRIDE {
    if (!offscreen_contexts_.get() ||
        offscreen_contexts_->DestroyedOnMainThread()) {
      offscreen_contexts_ =
          TestContextProvider::Create(CreateOffscreenContext3d());
    }
    return offscreen_contexts_;
  }

  virtual DrawSwapReadbackResult::DrawResult PrepareToDrawOnThread(
      LayerTreeHostImpl* host_impl,
      LayerTreeHostImpl::FrameData* frame,
      DrawSwapReadbackResult::DrawResult draw_result) OVERRIDE {
    EXPECT_EQ(DrawSwapReadbackResult::DRAW_SUCCESS, draw_result);
    if (!times_to_lose_during_draw_)
      return draw_result;

    --times_to_lose_during_draw_;
    LoseContext();

    times_to_fail_create_ = times_to_fail_recreate_;
    times_to_fail_recreate_ = 0;
    times_to_fail_create_offscreen_ = times_to_fail_recreate_offscreen_;
    times_to_fail_recreate_offscreen_ = 0;

    return draw_result;
  }

  virtual void CommitCompleteOnThread(LayerTreeHostImpl* host_impl) OVERRIDE {
    committed_at_least_once_ = true;

    if (!times_to_lose_during_commit_)
      return;
    --times_to_lose_during_commit_;
    LoseContext();

    times_to_fail_create_ = times_to_fail_recreate_;
    times_to_fail_recreate_ = 0;
    times_to_fail_create_offscreen_ = times_to_fail_recreate_offscreen_;
    times_to_fail_recreate_offscreen_ = 0;
  }

  virtual void DidFailToInitializeOutputSurface() OVERRIDE {
    ++times_create_failed_;
  }

  virtual void TearDown() OVERRIDE {
    LayerTreeTest::TearDown();
    EXPECT_EQ(times_to_expect_create_failed_, times_create_failed_);
  }

  void ExpectCreateToFail() { ++times_to_expect_create_failed_; }

 protected:
  TestWebGraphicsContext3D* context3d_;
  int times_to_fail_create_;
  int times_to_lose_during_commit_;
  int times_to_lose_during_draw_;
  int times_to_fail_recreate_;
  int times_to_fail_create_offscreen_;
  int times_to_fail_recreate_offscreen_;
  int times_to_expect_create_failed_;
  int times_create_failed_;
  int times_offscreen_created_;
  bool committed_at_least_once_;
  bool context_should_support_io_surface_;
  bool fallback_context_works_;

  scoped_refptr<TestContextProvider> offscreen_contexts_;
};

class LayerTreeHostContextTestLostContextSucceeds
    : public LayerTreeHostContextTest {
 public:
  LayerTreeHostContextTestLostContextSucceeds()
      : LayerTreeHostContextTest(),
        test_case_(0),
        num_losses_(0),
        num_losses_last_test_case_(-1),
        recovered_context_(true),
        first_initialized_(false) {}

  virtual void BeginTest() OVERRIDE { PostSetNeedsCommitToMainThread(); }

  virtual void DidInitializeOutputSurface(bool succeeded) OVERRIDE {
    EXPECT_TRUE(succeeded);

    if (first_initialized_)
      ++num_losses_;
    else
      first_initialized_ = true;

    recovered_context_ = true;
  }

  virtual void AfterTest() OVERRIDE { EXPECT_EQ(9u, test_case_); }

  virtual void DidCommitAndDrawFrame() OVERRIDE {
    // If the last frame had a context loss, then we'll commit again to
    // recover.
    if (!recovered_context_)
      return;
    if (times_to_lose_during_commit_)
      return;
    if (times_to_lose_during_draw_)
      return;

    recovered_context_ = false;
    if (NextTestCase())
      InvalidateAndSetNeedsCommit();
    else
      EndTest();
  }

  virtual void InvalidateAndSetNeedsCommit() {
    // Cause damage so we try to draw.
    layer_tree_host()->root_layer()->SetNeedsDisplay();
    layer_tree_host()->SetNeedsCommit();
  }

  bool NextTestCase() {
    static const TestCase kTests[] = {
        // Losing the context and failing to recreate it (or losing it again
        // immediately) a small number of times should succeed.
        {1,      // times_to_lose_during_commit
         0,      // times_to_lose_during_draw
         0,      // times_to_fail_recreate
         0,      // times_to_fail_recreate_offscreen
         false,  // fallback_context_works
        },
        {0,      // times_to_lose_during_commit
         1,      // times_to_lose_during_draw
         0,      // times_to_fail_recreate
         0,      // times_to_fail_recreate_offscreen
         false,  // fallback_context_works
        },
        {1,      // times_to_lose_during_commit
         0,      // times_to_lose_during_draw
         3,      // times_to_fail_recreate
         0,      // times_to_fail_recreate_offscreen
         false,  // fallback_context_works
        },
        {0,      // times_to_lose_during_commit
         1,      // times_to_lose_during_draw
         3,      // times_to_fail_recreate
         0,      // times_to_fail_recreate_offscreen
         false,  // fallback_context_works
        },
        {1,      // times_to_lose_during_commit
         0,      // times_to_lose_during_draw
         0,      // times_to_fail_recreate
         3,      // times_to_fail_recreate_offscreen
         false,  // fallback_context_works
        },
        {0,      // times_to_lose_during_commit
         1,      // times_to_lose_during_draw
         0,      // times_to_fail_recreate
         3,      // times_to_fail_recreate_offscreen
         false,  // fallback_context_works
        },
        // Losing the context and recreating it any number of times should
        // succeed.
        {10,     // times_to_lose_during_commit
         0,      // times_to_lose_during_draw
         0,      // times_to_fail_recreate
         0,      // times_to_fail_recreate_offscreen
         false,  // fallback_context_works
        },
        {0,      // times_to_lose_during_commit
         10,     // times_to_lose_during_draw
         0,      // times_to_fail_recreate
         0,      // times_to_fail_recreate_offscreen
         false,  // fallback_context_works
        },
        // Losing the context, failing to reinitialize it, and making a fallback
        // context should work.
        {0,     // times_to_lose_during_commit
         1,     // times_to_lose_during_draw
         0,     // times_to_fail_recreate
         0,     // times_to_fail_recreate_offscreen
         true,  // fallback_context_works
        }, };

    if (test_case_ >= arraysize(kTests))
      return false;
    // Make sure that we lost our context at least once in the last test run so
    // the test did something.
    EXPECT_GT(num_losses_, num_losses_last_test_case_);
    num_losses_last_test_case_ = num_losses_;

    times_to_lose_during_commit_ =
        kTests[test_case_].times_to_lose_during_commit;
    times_to_lose_during_draw_ = kTests[test_case_].times_to_lose_during_draw;
    times_to_fail_recreate_ = kTests[test_case_].times_to_fail_recreate;
    times_to_fail_recreate_offscreen_ =
        kTests[test_case_].times_to_fail_recreate_offscreen;
    fallback_context_works_ = kTests[test_case_].fallback_context_works;
    ++test_case_;
    return true;
  }

  struct TestCase {
    int times_to_lose_during_commit;
    int times_to_lose_during_draw;
    int times_to_fail_recreate;
    int times_to_fail_recreate_offscreen;
    bool fallback_context_works;
  };

 protected:
  size_t test_case_;
  int num_losses_;
  int num_losses_last_test_case_;
  bool recovered_context_;
  bool first_initialized_;
};

SINGLE_AND_MULTI_THREAD_TEST_F(LayerTreeHostContextTestLostContextSucceeds);

class LayerTreeHostClientNotReadyDoesNotCreateOutputSurface
    : public LayerTreeHostContextTest {
 public:
  LayerTreeHostClientNotReadyDoesNotCreateOutputSurface()
      : LayerTreeHostContextTest() {}

  virtual void WillBeginTest() OVERRIDE {
    // Override and do not signal SetLayerTreeHostClientReady.
  }

  virtual void BeginTest() OVERRIDE {
    PostSetNeedsCommitToMainThread();
    EndTest();
  }

  virtual scoped_ptr<OutputSurface> CreateOutputSurface(bool fallback)
      OVERRIDE {
    EXPECT_TRUE(false);
    return scoped_ptr<OutputSurface>();
  }

  virtual void DidInitializeOutputSurface(bool succeeded) OVERRIDE {
    EXPECT_TRUE(false);
  }

  virtual void AfterTest() OVERRIDE {
  }
};

MULTI_THREAD_TEST_F(LayerTreeHostClientNotReadyDoesNotCreateOutputSurface);

class LayerTreeHostContextTestLostContextSucceedsWithContent
    : public LayerTreeHostContextTestLostContextSucceeds {
 public:
  LayerTreeHostContextTestLostContextSucceedsWithContent()
      : LayerTreeHostContextTestLostContextSucceeds() {}

  virtual void SetupTree() OVERRIDE {
    root_ = Layer::Create();
    root_->SetBounds(gfx::Size(10, 10));
    root_->SetAnchorPoint(gfx::PointF());
    root_->SetIsDrawable(true);

    content_ = FakeContentLayer::Create(&client_);
    content_->SetBounds(gfx::Size(10, 10));
    content_->SetAnchorPoint(gfx::PointF());
    content_->SetIsDrawable(true);
    if (use_surface_) {
      content_->SetForceRenderSurface(true);
      // Filters require us to create an offscreen context.
      FilterOperations filters;
      filters.Append(FilterOperation::CreateGrayscaleFilter(0.5f));
      content_->SetFilters(filters);
      content_->SetBackgroundFilters(filters);
    }

    root_->AddChild(content_);

    layer_tree_host()->SetRootLayer(root_);
    LayerTreeHostContextTest::SetupTree();
  }

  virtual void InvalidateAndSetNeedsCommit() OVERRIDE {
    // Invalidate the render surface so we don't try to use a cached copy of the
    // surface.  We want to make sure to test the drawing paths for drawing to
    // a child surface.
    content_->SetNeedsDisplay();
    LayerTreeHostContextTestLostContextSucceeds::InvalidateAndSetNeedsCommit();
  }

  virtual void DrawLayersOnThread(LayerTreeHostImpl* host_impl) OVERRIDE {
    FakeContentLayerImpl* content_impl = static_cast<FakeContentLayerImpl*>(
        host_impl->active_tree()->root_layer()->children()[0]);
    // Even though the context was lost, we should have a resource. The
    // TestWebGraphicsContext3D ensures that this resource is created with
    // the active context.
    EXPECT_TRUE(content_impl->HaveResourceForTileAt(0, 0));

    ContextProvider* contexts = host_impl->offscreen_context_provider();
    if (use_surface_) {
      ASSERT_TRUE(contexts);
      EXPECT_TRUE(contexts->ContextGL());
      // TODO(danakj): Make a fake GrContext.
      // EXPECT_TRUE(contexts->GrContext());
    } else {
      EXPECT_FALSE(contexts);
    }
  }

  virtual void AfterTest() OVERRIDE {
    LayerTreeHostContextTestLostContextSucceeds::AfterTest();
    if (use_surface_) {
      // 1 create to start with +
      // 4 from test cases that lose the offscreen context directly +
      // 2 from test cases that create a fallback +
      // All the test cases that recreate both contexts only once
      // per time it is lost.
      EXPECT_EQ(4 + 1 + 2 + num_losses_, times_offscreen_created_);
    } else {
      EXPECT_EQ(0, times_offscreen_created_);
    }
  }

 protected:
  bool use_surface_;
  FakeContentLayerClient client_;
  scoped_refptr<Layer> root_;
  scoped_refptr<ContentLayer> content_;
};

TEST_F(LayerTreeHostContextTestLostContextSucceedsWithContent,
       NoSurface_SingleThread_DirectRenderer) {
  use_surface_ = false;
  RunTest(false, false, false);
}

TEST_F(LayerTreeHostContextTestLostContextSucceedsWithContent,
       NoSurface_SingleThread_DelegatingRenderer) {
  use_surface_ = false;
  RunTest(false, true, false);
}

TEST_F(LayerTreeHostContextTestLostContextSucceedsWithContent,
       NoSurface_MultiThread_DirectRenderer_MainThreadPaint) {
  use_surface_ = false;
  RunTest(true, false, false);
}

TEST_F(LayerTreeHostContextTestLostContextSucceedsWithContent,
       NoSurface_MultiThread_DelegatingRenderer_MainThreadPaint) {
  use_surface_ = false;
  RunTest(true, true, false);
}

// Surfaces don't exist with a delegating renderer.
TEST_F(LayerTreeHostContextTestLostContextSucceedsWithContent,
       WithSurface_SingleThread_DirectRenderer) {
  use_surface_ = true;
  RunTest(false, false, false);
}

TEST_F(LayerTreeHostContextTestLostContextSucceedsWithContent,
       WithSurface_MultiThread_DirectRenderer_MainThreadPaint) {
  use_surface_ = true;
  RunTest(true, false, false);
}

class LayerTreeHostContextTestCreateOutputSurfaceFails
    : public LayerTreeHostContextTest {
 public:
  // Run a test that initially fails OutputSurface creation |times_to_fail|
  // times. If |expect_fallback_attempt| is |true|, an attempt to create a
  // fallback/software OutputSurface is expected to occur.
  LayerTreeHostContextTestCreateOutputSurfaceFails(int times_to_fail,
                                                   bool expect_fallback_attempt,
                                                   bool expect_to_give_up)
      : times_to_fail_(times_to_fail),
        expect_fallback_attempt_(expect_fallback_attempt),
        expect_to_give_up_(expect_to_give_up),
        did_attempt_fallback_(false),
        times_initialized_(0) {}

  virtual void BeginTest() OVERRIDE {
    times_to_fail_create_ = times_to_fail_;
    PostSetNeedsCommitToMainThread();
  }

  virtual scoped_ptr<FakeOutputSurface> CreateFakeOutputSurface(bool fallback)
      OVERRIDE {
    scoped_ptr<FakeOutputSurface> surface =
        LayerTreeHostContextTest::CreateFakeOutputSurface(fallback);

    if (surface)
      EXPECT_EQ(times_to_fail_, times_create_failed_);

    did_attempt_fallback_ = fallback;
    return surface.Pass();
  }

  virtual void DidInitializeOutputSurface(bool succeeded) OVERRIDE {
    if (succeeded)
      times_initialized_++;
    else
      EndTest();
  }

  virtual void DrawLayersOnThread(LayerTreeHostImpl* host_impl) OVERRIDE {
    EndTest();
  }

  virtual void AfterTest() OVERRIDE {
    EXPECT_EQ(times_to_fail_, times_create_failed_);
    EXPECT_EQ(expect_to_give_up_, times_initialized_ == 0);
    EXPECT_EQ(expect_fallback_attempt_, did_attempt_fallback_);
  }

 private:
  int times_to_fail_;
  bool expect_fallback_attempt_;
  bool expect_to_give_up_;
  bool did_attempt_fallback_;
  int times_initialized_;
};

class LayerTreeHostContextTestCreateOutputSurfaceFailsOnce
    : public LayerTreeHostContextTestCreateOutputSurfaceFails {
 public:
  LayerTreeHostContextTestCreateOutputSurfaceFailsOnce()
      : LayerTreeHostContextTestCreateOutputSurfaceFails(1, false, false) {}
};

SINGLE_AND_MULTI_THREAD_TEST_F(
    LayerTreeHostContextTestCreateOutputSurfaceFailsOnce);

// After 4 failures we expect an attempt to create a fallback/software
// OutputSurface.
class LayerTreeHostContextTestCreateOutputSurfaceFailsWithFallback
    : public LayerTreeHostContextTestCreateOutputSurfaceFails {
 public:
  LayerTreeHostContextTestCreateOutputSurfaceFailsWithFallback()
      : LayerTreeHostContextTestCreateOutputSurfaceFails(4, true, false) {}
};

SINGLE_AND_MULTI_THREAD_TEST_F(
    LayerTreeHostContextTestCreateOutputSurfaceFailsWithFallback);

// If we fail that often, we should be giving up cleanly.
class LayerTreeHostContextTestCreateOutputSurfaceIsHopeless
    : public LayerTreeHostContextTestCreateOutputSurfaceFails {
 public:
  LayerTreeHostContextTestCreateOutputSurfaceIsHopeless()
      : LayerTreeHostContextTestCreateOutputSurfaceFails(5, true, true) {}
};

SINGLE_AND_MULTI_THREAD_TEST_F(
    LayerTreeHostContextTestCreateOutputSurfaceIsHopeless);


class LayerTreeHostContextTestOffscreenContextFails
    : public LayerTreeHostContextTest {
 public:
  virtual void SetupTree() OVERRIDE {
    root_ = Layer::Create();
    root_->SetBounds(gfx::Size(10, 10));
    root_->SetAnchorPoint(gfx::PointF());
    root_->SetIsDrawable(true);

    content_ = FakeContentLayer::Create(&client_);
    content_->SetBounds(gfx::Size(10, 10));
    content_->SetAnchorPoint(gfx::PointF());
    content_->SetIsDrawable(true);
    content_->SetForceRenderSurface(true);
    // Filters require us to create an offscreen context.
    FilterOperations filters;
    filters.Append(FilterOperation::CreateGrayscaleFilter(0.5f));
    content_->SetFilters(filters);
    content_->SetBackgroundFilters(filters);

    root_->AddChild(content_);

    layer_tree_host()->SetRootLayer(root_);
    LayerTreeHostContextTest::SetupTree();
  }

  virtual void BeginTest() OVERRIDE {
    times_to_fail_create_offscreen_ = 1;
    PostSetNeedsCommitToMainThread();
  }

  virtual void DrawLayersOnThread(LayerTreeHostImpl* host_impl) OVERRIDE {
    ContextProvider* contexts = host_impl->offscreen_context_provider();
    EXPECT_FALSE(contexts);

    // This did not lead to create failure.
    times_to_expect_create_failed_ = 0;
    EndTest();
  }

  virtual void AfterTest() OVERRIDE {}

 protected:
  FakeContentLayerClient client_;
  scoped_refptr<Layer> root_;
  scoped_refptr<ContentLayer> content_;
};

SINGLE_AND_MULTI_THREAD_TEST_F(LayerTreeHostContextTestOffscreenContextFails);

class LayerTreeHostContextTestLostContextFails
    : public LayerTreeHostContextTest {
 public:
  LayerTreeHostContextTestLostContextFails()
      : LayerTreeHostContextTest(), num_commits_(0), first_initialized_(false) {
    times_to_lose_during_commit_ = 1;
  }

  virtual void BeginTest() OVERRIDE { PostSetNeedsCommitToMainThread(); }

  virtual void DidInitializeOutputSurface(bool succeeded) OVERRIDE {
    if (first_initialized_) {
      EXPECT_FALSE(succeeded);
      EndTest();
    } else {
      first_initialized_ = true;
    }
  }

  virtual void CommitCompleteOnThread(LayerTreeHostImpl* host_impl) OVERRIDE {
    LayerTreeHostContextTest::CommitCompleteOnThread(host_impl);

    ++num_commits_;
    if (num_commits_ == 1) {
      // When the context is ok, we should have these things.
      EXPECT_TRUE(host_impl->output_surface());
      EXPECT_TRUE(host_impl->renderer());
      EXPECT_TRUE(host_impl->resource_provider());
      return;
    }

    // When context recreation fails we shouldn't be left with any of them.
    EXPECT_FALSE(host_impl->output_surface());
    EXPECT_FALSE(host_impl->renderer());
    EXPECT_FALSE(host_impl->resource_provider());
  }

  virtual void AfterTest() OVERRIDE {}

 private:
  int num_commits_;
  bool first_initialized_;
};

class LayerTreeHostContextTestLostContextAndEvictTextures
    : public LayerTreeHostContextTest {
 public:
  LayerTreeHostContextTestLostContextAndEvictTextures()
      : LayerTreeHostContextTest(),
        layer_(FakeContentLayer::Create(&client_)),
        impl_host_(0),
        num_commits_(0) {}

  virtual void SetupTree() OVERRIDE {
    layer_->SetBounds(gfx::Size(10, 20));
    layer_tree_host()->SetRootLayer(layer_);
    LayerTreeHostContextTest::SetupTree();
  }

  virtual void BeginTest() OVERRIDE { PostSetNeedsCommitToMainThread(); }

  void PostEvictTextures() {
    if (HasImplThread()) {
      ImplThreadTaskRunner()->PostTask(
          FROM_HERE,
          base::Bind(&LayerTreeHostContextTestLostContextAndEvictTextures::
                          EvictTexturesOnImplThread,
                     base::Unretained(this)));
    } else {
      DebugScopedSetImplThread impl(proxy());
      EvictTexturesOnImplThread();
    }
  }

  void EvictTexturesOnImplThread() {
    impl_host_->EvictTexturesForTesting();
    if (lose_after_evict_)
      LoseContext();
  }

  virtual void DidCommitAndDrawFrame() OVERRIDE {
    if (num_commits_ > 1)
      return;
    EXPECT_TRUE(layer_->HaveBackingAt(0, 0));
    PostEvictTextures();
  }

  virtual void CommitCompleteOnThread(LayerTreeHostImpl* impl) OVERRIDE {
    LayerTreeHostContextTest::CommitCompleteOnThread(impl);
    if (num_commits_ > 1)
      return;
    ++num_commits_;
    if (!lose_after_evict_)
      LoseContext();
    impl_host_ = impl;
  }

  virtual void DidInitializeOutputSurface(bool succeeded) OVERRIDE {
    EXPECT_TRUE(succeeded);
    EndTest();
  }

  virtual void AfterTest() OVERRIDE {}

 protected:
  bool lose_after_evict_;
  FakeContentLayerClient client_;
  scoped_refptr<FakeContentLayer> layer_;
  LayerTreeHostImpl* impl_host_;
  int num_commits_;
};

TEST_F(LayerTreeHostContextTestLostContextAndEvictTextures,
       LoseAfterEvict_SingleThread_DirectRenderer) {
  lose_after_evict_ = true;
  RunTest(false, false, false);
}

TEST_F(LayerTreeHostContextTestLostContextAndEvictTextures,
       LoseAfterEvict_SingleThread_DelegatingRenderer) {
  lose_after_evict_ = true;
  RunTest(false, true, false);
}

TEST_F(LayerTreeHostContextTestLostContextAndEvictTextures,
       LoseAfterEvict_MultiThread_DirectRenderer_MainThreadPaint) {
  lose_after_evict_ = true;
  RunTest(true, false, false);
}

TEST_F(LayerTreeHostContextTestLostContextAndEvictTextures,
       LoseAfterEvict_MultiThread_DelegatingRenderer_MainThreadPaint) {
  lose_after_evict_ = true;
  RunTest(true, true, false);
}

// Flaky on all platforms, http://crbug.com/310979
TEST_F(LayerTreeHostContextTestLostContextAndEvictTextures,
       DISABLED_LoseAfterEvict_MultiThread_DelegatingRenderer_ImplSidePaint) {
  lose_after_evict_ = true;
  RunTest(true, true, true);
}

TEST_F(LayerTreeHostContextTestLostContextAndEvictTextures,
       LoseBeforeEvict_SingleThread_DirectRenderer) {
  lose_after_evict_ = false;
  RunTest(false, false, false);
}

TEST_F(LayerTreeHostContextTestLostContextAndEvictTextures,
       LoseBeforeEvict_SingleThread_DelegatingRenderer) {
  lose_after_evict_ = false;
  RunTest(false, true, false);
}

TEST_F(LayerTreeHostContextTestLostContextAndEvictTextures,
       LoseBeforeEvict_MultiThread_DirectRenderer_MainThreadPaint) {
  lose_after_evict_ = false;
  RunTest(true, false, false);
}

TEST_F(LayerTreeHostContextTestLostContextAndEvictTextures,
       LoseBeforeEvict_MultiThread_DirectRenderer_ImplSidePaint) {
  lose_after_evict_ = false;
  RunTest(true, false, true);
}

TEST_F(LayerTreeHostContextTestLostContextAndEvictTextures,
       LoseBeforeEvict_MultiThread_DelegatingRenderer_MainThreadPaint) {
  lose_after_evict_ = false;
  RunTest(true, true, false);
}

TEST_F(LayerTreeHostContextTestLostContextAndEvictTextures,
       LoseBeforeEvict_MultiThread_DelegatingRenderer_ImplSidePaint) {
  lose_after_evict_ = false;
  RunTest(true, true, true);
}

class LayerTreeHostContextTestLostContextWhileUpdatingResources
    : public LayerTreeHostContextTest {
 public:
  LayerTreeHostContextTestLostContextWhileUpdatingResources()
      : parent_(FakeContentLayer::Create(&client_)),
        num_children_(50),
        times_to_lose_on_end_query_(3) {}

  virtual scoped_ptr<TestWebGraphicsContext3D> CreateContext3d() OVERRIDE {
    scoped_ptr<TestWebGraphicsContext3D> context =
        LayerTreeHostContextTest::CreateContext3d();
    if (times_to_lose_on_end_query_) {
      --times_to_lose_on_end_query_;
      context->set_times_end_query_succeeds(5);
    }
    return context.Pass();
  }

  virtual void SetupTree() OVERRIDE {
    parent_->SetBounds(gfx::Size(num_children_, 1));

    for (int i = 0; i < num_children_; i++) {
      scoped_refptr<FakeContentLayer> child =
          FakeContentLayer::Create(&client_);
      child->SetPosition(gfx::PointF(i, 0.f));
      child->SetBounds(gfx::Size(1, 1));
      parent_->AddChild(child);
    }

    layer_tree_host()->SetRootLayer(parent_);
    LayerTreeHostContextTest::SetupTree();
  }

  virtual void BeginTest() OVERRIDE { PostSetNeedsCommitToMainThread(); }

  virtual void DrawLayersOnThread(LayerTreeHostImpl* host_impl) OVERRIDE {
    EXPECT_EQ(0, times_to_lose_on_end_query_);
    EndTest();
  }

  virtual void DidInitializeOutputSurface(bool succeeded) OVERRIDE {
    EXPECT_TRUE(succeeded);
  }

  virtual void AfterTest() OVERRIDE {
    EXPECT_EQ(0, times_to_lose_on_end_query_);
  }

 private:
  FakeContentLayerClient client_;
  scoped_refptr<FakeContentLayer> parent_;
  int num_children_;
  int times_to_lose_on_end_query_;
};

SINGLE_AND_MULTI_THREAD_NOIMPL_TEST_F(
    LayerTreeHostContextTestLostContextWhileUpdatingResources);

class LayerTreeHostContextTestLayersNotified : public LayerTreeHostContextTest {
 public:
  LayerTreeHostContextTestLayersNotified()
      : LayerTreeHostContextTest(), num_commits_(0) {}

  virtual void SetupTree() OVERRIDE {
    root_ = FakeContentLayer::Create(&client_);
    child_ = FakeContentLayer::Create(&client_);
    grandchild_ = FakeContentLayer::Create(&client_);

    root_->AddChild(child_);
    child_->AddChild(grandchild_);

    layer_tree_host()->SetRootLayer(root_);
    LayerTreeHostContextTest::SetupTree();
  }

  virtual void BeginTest() OVERRIDE { PostSetNeedsCommitToMainThread(); }

  virtual void DidActivateTreeOnThread(LayerTreeHostImpl* host_impl) OVERRIDE {
    LayerTreeHostContextTest::DidActivateTreeOnThread(host_impl);

    FakeContentLayerImpl* root = static_cast<FakeContentLayerImpl*>(
        host_impl->active_tree()->root_layer());
    FakeContentLayerImpl* child =
        static_cast<FakeContentLayerImpl*>(root->children()[0]);
    FakeContentLayerImpl* grandchild =
        static_cast<FakeContentLayerImpl*>(child->children()[0]);

    ++num_commits_;
    switch (num_commits_) {
      case 1:
        EXPECT_EQ(0u, root->lost_output_surface_count());
        EXPECT_EQ(0u, child->lost_output_surface_count());
        EXPECT_EQ(0u, grandchild->lost_output_surface_count());
        // Lose the context and struggle to recreate it.
        LoseContext();
        times_to_fail_create_ = 1;
        break;
      case 2:
        EXPECT_GE(1u, root->lost_output_surface_count());
        EXPECT_GE(1u, child->lost_output_surface_count());
        EXPECT_GE(1u, grandchild->lost_output_surface_count());
        EndTest();
        break;
      default:
        NOTREACHED();
    }
  }

  virtual void AfterTest() OVERRIDE {}

 private:
  int num_commits_;

  FakeContentLayerClient client_;
  scoped_refptr<FakeContentLayer> root_;
  scoped_refptr<FakeContentLayer> child_;
  scoped_refptr<FakeContentLayer> grandchild_;
};

SINGLE_AND_MULTI_THREAD_TEST_F(LayerTreeHostContextTestLayersNotified);

class LayerTreeHostContextTestDontUseLostResources
    : public LayerTreeHostContextTest {
 public:
  LayerTreeHostContextTestDontUseLostResources() : lost_context_(false) {
    context_should_support_io_surface_ = true;

    child_output_surface_ = FakeOutputSurface::Create3d();
    child_output_surface_->BindToClient(&output_surface_client_);
    shared_bitmap_manager_.reset(new TestSharedBitmapManager());
    child_resource_provider_ = ResourceProvider::Create(
        child_output_surface_.get(), shared_bitmap_manager_.get(), 0, false, 1);
  }

  static void EmptyReleaseCallback(unsigned sync_point, bool lost) {}

  virtual void SetupTree() OVERRIDE {
    gpu::gles2::GLES2Interface* gl =
        child_output_surface_->context_provider()->ContextGL();

    scoped_ptr<DelegatedFrameData> frame_data(new DelegatedFrameData);

    scoped_ptr<TestRenderPass> pass_for_quad = TestRenderPass::Create();
    pass_for_quad->SetNew(
        // AppendOneOfEveryQuadType() makes a RenderPass quad with this id.
        RenderPass::Id(2, 1),
        gfx::Rect(0, 0, 10, 10),
        gfx::Rect(0, 0, 10, 10),
        gfx::Transform());

    scoped_ptr<TestRenderPass> pass = TestRenderPass::Create();
    pass->SetNew(RenderPass::Id(1, 1),
                 gfx::Rect(0, 0, 10, 10),
                 gfx::Rect(0, 0, 10, 10),
                 gfx::Transform());
    pass->AppendOneOfEveryQuadType(child_resource_provider_.get(),
                                   RenderPass::Id(2, 1));

    frame_data->render_pass_list.push_back(pass_for_quad.PassAs<RenderPass>());
    frame_data->render_pass_list.push_back(pass.PassAs<RenderPass>());

    delegated_resource_collection_ = new DelegatedFrameResourceCollection;
    delegated_frame_provider_ = new DelegatedFrameProvider(
        delegated_resource_collection_.get(), frame_data.Pass());

    ResourceProvider::ResourceId resource =
        child_resource_provider_->CreateResource(
            gfx::Size(4, 4),
            GL_CLAMP_TO_EDGE,
            ResourceProvider::TextureUsageAny,
            RGBA_8888);
    ResourceProvider::ScopedWriteLockGL lock(child_resource_provider_.get(),
                                             resource);

    gpu::Mailbox mailbox;
    gl->GenMailboxCHROMIUM(mailbox.name);
    GLuint sync_point = gl->InsertSyncPointCHROMIUM();

    scoped_refptr<Layer> root = Layer::Create();
    root->SetBounds(gfx::Size(10, 10));
    root->SetAnchorPoint(gfx::PointF());
    root->SetIsDrawable(true);

    scoped_refptr<FakeDelegatedRendererLayer> delegated =
        FakeDelegatedRendererLayer::Create(delegated_frame_provider_.get());
    delegated->SetBounds(gfx::Size(10, 10));
    delegated->SetAnchorPoint(gfx::PointF());
    delegated->SetIsDrawable(true);
    root->AddChild(delegated);

    scoped_refptr<ContentLayer> content = ContentLayer::Create(&client_);
    content->SetBounds(gfx::Size(10, 10));
    content->SetAnchorPoint(gfx::PointF());
    content->SetIsDrawable(true);
    root->AddChild(content);

    scoped_refptr<TextureLayer> texture = TextureLayer::CreateForMailbox(NULL);
    texture->SetBounds(gfx::Size(10, 10));
    texture->SetAnchorPoint(gfx::PointF());
    texture->SetIsDrawable(true);
    texture->SetTextureMailbox(
        TextureMailbox(mailbox, GL_TEXTURE_2D, sync_point),
        SingleReleaseCallback::Create(
            base::Bind(&LayerTreeHostContextTestDontUseLostResources::
                            EmptyReleaseCallback)));
    root->AddChild(texture);

    scoped_refptr<ContentLayer> mask = ContentLayer::Create(&client_);
    mask->SetBounds(gfx::Size(10, 10));
    mask->SetAnchorPoint(gfx::PointF());

    scoped_refptr<ContentLayer> content_with_mask =
        ContentLayer::Create(&client_);
    content_with_mask->SetBounds(gfx::Size(10, 10));
    content_with_mask->SetAnchorPoint(gfx::PointF());
    content_with_mask->SetIsDrawable(true);
    content_with_mask->SetMaskLayer(mask.get());
    root->AddChild(content_with_mask);

    scoped_refptr<VideoLayer> video_color =
        VideoLayer::Create(&color_frame_provider_);
    video_color->SetBounds(gfx::Size(10, 10));
    video_color->SetAnchorPoint(gfx::PointF());
    video_color->SetIsDrawable(true);
    root->AddChild(video_color);

    scoped_refptr<VideoLayer> video_hw =
        VideoLayer::Create(&hw_frame_provider_);
    video_hw->SetBounds(gfx::Size(10, 10));
    video_hw->SetAnchorPoint(gfx::PointF());
    video_hw->SetIsDrawable(true);
    root->AddChild(video_hw);

    scoped_refptr<VideoLayer> video_scaled_hw =
        VideoLayer::Create(&scaled_hw_frame_provider_);
    video_scaled_hw->SetBounds(gfx::Size(10, 10));
    video_scaled_hw->SetAnchorPoint(gfx::PointF());
    video_scaled_hw->SetIsDrawable(true);
    root->AddChild(video_scaled_hw);

    color_video_frame_ = VideoFrame::CreateColorFrame(
        gfx::Size(4, 4), 0x80, 0x80, 0x80, base::TimeDelta());
    hw_video_frame_ =
        VideoFrame::WrapNativeTexture(make_scoped_ptr(new gpu::MailboxHolder(
                                          mailbox, GL_TEXTURE_2D, sync_point)),
                                      media::VideoFrame::ReleaseMailboxCB(),
                                      gfx::Size(4, 4),
                                      gfx::Rect(0, 0, 4, 4),
                                      gfx::Size(4, 4),
                                      base::TimeDelta(),
                                      VideoFrame::ReadPixelsCB());
    scaled_hw_video_frame_ =
        VideoFrame::WrapNativeTexture(make_scoped_ptr(new gpu::MailboxHolder(
                                          mailbox, GL_TEXTURE_2D, sync_point)),
                                      media::VideoFrame::ReleaseMailboxCB(),
                                      gfx::Size(4, 4),
                                      gfx::Rect(0, 0, 3, 2),
                                      gfx::Size(4, 4),
                                      base::TimeDelta(),
                                      VideoFrame::ReadPixelsCB());

    color_frame_provider_.set_frame(color_video_frame_);
    hw_frame_provider_.set_frame(hw_video_frame_);
    scaled_hw_frame_provider_.set_frame(scaled_hw_video_frame_);

    if (!delegating_renderer()) {
      // TODO(danakj): IOSurface layer can not be transported. crbug.com/239335
      scoped_refptr<IOSurfaceLayer> io_surface = IOSurfaceLayer::Create();
      io_surface->SetBounds(gfx::Size(10, 10));
      io_surface->SetAnchorPoint(gfx::PointF());
      io_surface->SetIsDrawable(true);
      io_surface->SetIOSurfaceProperties(1, gfx::Size(10, 10));
      root->AddChild(io_surface);
    }

    // Enable the hud.
    LayerTreeDebugState debug_state;
    debug_state.show_property_changed_rects = true;
    layer_tree_host()->SetDebugState(debug_state);

    scoped_refptr<PaintedScrollbarLayer> scrollbar =
        PaintedScrollbarLayer::Create(
            scoped_ptr<Scrollbar>(new FakeScrollbar).Pass(), content->id());
    scrollbar->SetBounds(gfx::Size(10, 10));
    scrollbar->SetAnchorPoint(gfx::PointF());
    scrollbar->SetIsDrawable(true);
    root->AddChild(scrollbar);

    layer_tree_host()->SetRootLayer(root);
    LayerTreeHostContextTest::SetupTree();
  }

  virtual void BeginTest() OVERRIDE { PostSetNeedsCommitToMainThread(); }

  virtual void CommitCompleteOnThread(LayerTreeHostImpl* host_impl) OVERRIDE {
    LayerTreeHostContextTest::CommitCompleteOnThread(host_impl);

    if (host_impl->active_tree()->source_frame_number() == 3) {
      // On the third commit we're recovering from context loss. Hardware
      // video frames should not be reused by the VideoFrameProvider, but
      // software frames can be.
      hw_frame_provider_.set_frame(NULL);
      scaled_hw_frame_provider_.set_frame(NULL);
    }
  }

  virtual DrawSwapReadbackResult::DrawResult PrepareToDrawOnThread(
      LayerTreeHostImpl* host_impl,
      LayerTreeHostImpl::FrameData* frame,
      DrawSwapReadbackResult::DrawResult draw_result) OVERRIDE {
    if (host_impl->active_tree()->source_frame_number() == 2) {
      // Lose the context during draw on the second commit. This will cause
      // a third commit to recover.
      context3d_->set_times_bind_texture_succeeds(0);
    }
    return draw_result;
  }

  virtual scoped_ptr<FakeOutputSurface> CreateFakeOutputSurface(bool fallback)
      OVERRIDE {
    // This will get called twice:
    // First when we create the initial output surface...
    if (layer_tree_host()->source_frame_number() > 0) {
      // ... and then again after we forced the context to be lost.
      lost_context_ = true;
    }
    return LayerTreeHostContextTest::CreateFakeOutputSurface(fallback);
  }

  virtual void DidCommitAndDrawFrame() OVERRIDE {
    ASSERT_TRUE(layer_tree_host()->hud_layer());
    // End the test once we know the 3nd frame drew.
    if (layer_tree_host()->source_frame_number() < 5) {
      layer_tree_host()->root_layer()->SetNeedsDisplay();
      layer_tree_host()->SetNeedsCommit();
    } else {
      EndTest();
    }
  }

  virtual void AfterTest() OVERRIDE { EXPECT_TRUE(lost_context_); }

 private:
  FakeContentLayerClient client_;
  bool lost_context_;

  FakeOutputSurfaceClient output_surface_client_;
  scoped_ptr<FakeOutputSurface> child_output_surface_;
  scoped_ptr<SharedBitmapManager> shared_bitmap_manager_;
  scoped_ptr<ResourceProvider> child_resource_provider_;

  scoped_refptr<DelegatedFrameResourceCollection>
      delegated_resource_collection_;
  scoped_refptr<DelegatedFrameProvider> delegated_frame_provider_;

  scoped_refptr<VideoFrame> color_video_frame_;
  scoped_refptr<VideoFrame> hw_video_frame_;
  scoped_refptr<VideoFrame> scaled_hw_video_frame_;

  FakeVideoFrameProvider color_frame_provider_;
  FakeVideoFrameProvider hw_frame_provider_;
  FakeVideoFrameProvider scaled_hw_frame_provider_;
};

SINGLE_AND_MULTI_THREAD_TEST_F(LayerTreeHostContextTestDontUseLostResources);

class LayerTreeHostContextTestCompositeAndReadbackBeforeOutputSurfaceInit
    : public LayerTreeHostContextTest {
 public:
  virtual void BeginTest() OVERRIDE {
    // This must be called immediately after creating LTH, before the first
    // OutputSurface is initialized.
    ASSERT_TRUE(layer_tree_host()->output_surface_lost());

    times_output_surface_created_ = 0;

    // Post the SetNeedsCommit before the readback to make sure it is run
    // on the main thread before the readback's replacement commit when
    // we have a threaded compositor.
    PostSetNeedsCommitToMainThread();

    char pixels[4];
    bool result =
        layer_tree_host()->CompositeAndReadback(&pixels, gfx::Rect(1, 1));
    EXPECT_EQ(!delegating_renderer(), result);
    EXPECT_EQ(1, times_output_surface_created_);
  }

  virtual void DidInitializeOutputSurface(bool succeeded) OVERRIDE {
    EXPECT_TRUE(succeeded);
    ++times_output_surface_created_;
  }

  virtual void DidCommitAndDrawFrame() OVERRIDE { EndTest(); }

  virtual void AfterTest() OVERRIDE {
    // Should not try to create output surface again after successfully
    // created by CompositeAndReadback.
    EXPECT_EQ(1, times_output_surface_created_);
  }

  virtual DrawSwapReadbackResult::DrawResult PrepareToDrawOnThread(
      LayerTreeHostImpl* host_impl,
      LayerTreeHostImpl::FrameData* frame_data,
      DrawSwapReadbackResult::DrawResult draw_result) OVERRIDE {
    EXPECT_GE(host_impl->active_tree()->source_frame_number(), 0);
    EXPECT_LE(host_impl->active_tree()->source_frame_number(), 1);
    return draw_result;
  }

  virtual void DrawLayersOnThread(LayerTreeHostImpl* host_impl) OVERRIDE {
    // We should only draw for the readback and the replacement commit.
    // The replacement commit will also be the first commit after output
    // surface initialization.
    EXPECT_GE(host_impl->active_tree()->source_frame_number(), 0);
    EXPECT_LE(host_impl->active_tree()->source_frame_number(), 1);
  }

  virtual void SwapBuffersOnThread(LayerTreeHostImpl* host_impl,
                                   bool result) OVERRIDE {
    // We should only swap for the replacement commit.
    EXPECT_EQ(host_impl->active_tree()->source_frame_number(), 1);
    EndTest();
  }

 private:
  int times_output_surface_created_;
};

SINGLE_AND_MULTI_THREAD_TEST_F(
    LayerTreeHostContextTestCompositeAndReadbackBeforeOutputSurfaceInit);

// This test verifies that losing an output surface during a
// simultaneous readback and forced redraw works and does not deadlock.
class LayerTreeHostContextTestLoseOutputSurfaceDuringReadbackAndForcedDraw
    : public LayerTreeHostContextTest {
 protected:
  static const int kFirstOutputSurfaceInitSourceFrameNumber = 0;
  static const int kReadbackSourceFrameNumber = 1;
  static const int kReadbackReplacementSourceFrameNumber = 2;
  static const int kSecondOutputSurfaceInitSourceFrameNumber = 3;

  LayerTreeHostContextTestLoseOutputSurfaceDuringReadbackAndForcedDraw()
      : did_react_to_first_commit_(false) {}

  virtual void InitializeSettings(LayerTreeSettings* settings) OVERRIDE {
    // This enables forced draws after a single prepare to draw failure.
    settings->timeout_and_draw_when_animation_checkerboards = true;
    settings->maximum_number_of_failed_draws_before_draw_is_forced_ = 1;
  }

  virtual void BeginTest() OVERRIDE { PostSetNeedsCommitToMainThread(); }

  virtual DrawSwapReadbackResult::DrawResult PrepareToDrawOnThread(
      LayerTreeHostImpl* host_impl,
      LayerTreeHostImpl::FrameData* frame_data,
      DrawSwapReadbackResult::DrawResult draw_result) OVERRIDE {
    int sfn = host_impl->active_tree()->source_frame_number();
    EXPECT_TRUE(sfn == kFirstOutputSurfaceInitSourceFrameNumber ||
                sfn == kSecondOutputSurfaceInitSourceFrameNumber ||
                sfn == kReadbackSourceFrameNumber)
        << sfn;

    // Before we react to the failed draw by initiating the forced draw
    // sequence, start a readback on the main thread and then lose the context
    // to start output surface initialization all at the same time.
    if (sfn == kFirstOutputSurfaceInitSourceFrameNumber &&
        !did_react_to_first_commit_) {
      did_react_to_first_commit_ = true;
      PostReadbackToMainThread();
      LoseContext();
    }

    return DrawSwapReadbackResult::DRAW_ABORTED_CHECKERBOARD_ANIMATIONS;
  }

  virtual void InitializedRendererOnThread(LayerTreeHostImpl* host_impl,
                                           bool success) OVERRIDE {
    // -1 is for the first output surface initialization.
    int sfn = host_impl->active_tree()->source_frame_number();
    EXPECT_TRUE(sfn == -1 || sfn == kReadbackReplacementSourceFrameNumber)
        << sfn;
  }

  virtual void DrawLayersOnThread(LayerTreeHostImpl* host_impl) OVERRIDE {
    // We should only draw the first commit after output surface initialization
    // and attempt to draw the readback commit (which will fail).
    // All others should abort because the output surface is lost.
    int sfn = host_impl->active_tree()->source_frame_number();
    EXPECT_TRUE(sfn == kSecondOutputSurfaceInitSourceFrameNumber ||
                sfn == kReadbackSourceFrameNumber)
        << sfn;
  }

  virtual void SwapBuffersOnThread(LayerTreeHostImpl* host_impl,
                                   bool result) OVERRIDE {
    // We should only swap the first commit after the second output surface
    // initialization.
    int sfn = host_impl->active_tree()->source_frame_number();
    EXPECT_TRUE(sfn == kSecondOutputSurfaceInitSourceFrameNumber) << sfn;
    EndTest();
  }

  virtual void AfterTest() OVERRIDE {}

  int did_react_to_first_commit_;
};

MULTI_THREAD_TEST_F(
    LayerTreeHostContextTestLoseOutputSurfaceDuringReadbackAndForcedDraw);

// This test verifies that losing an output surface right before a
// simultaneous readback and forced redraw works and does not deadlock.
class LayerTreeHostContextTestReadbackWithForcedDrawAndOutputSurfaceInit
    : public LayerTreeHostContextTest {
 protected:
  static const int kFirstOutputSurfaceInitSourceFrameNumber = 0;
  static const int kReadbackSourceFrameNumber = 1;
  static const int kForcedDrawCommitSourceFrameNumber = 2;
  static const int kSecondOutputSurfaceInitSourceFrameNumber = 2;

  LayerTreeHostContextTestReadbackWithForcedDrawAndOutputSurfaceInit()
      : did_lose_context_(false) {}

  virtual void InitializeSettings(LayerTreeSettings* settings) OVERRIDE {
    // This enables forced draws after a single prepare to draw failure.
    settings->timeout_and_draw_when_animation_checkerboards = true;
    settings->maximum_number_of_failed_draws_before_draw_is_forced_ = 1;
  }

  virtual void BeginTest() OVERRIDE { PostSetNeedsCommitToMainThread(); }

  virtual DrawSwapReadbackResult::DrawResult PrepareToDrawOnThread(
      LayerTreeHostImpl* host_impl,
      LayerTreeHostImpl::FrameData* frame_data,
      DrawSwapReadbackResult::DrawResult draw_result) OVERRIDE {
    int sfn = host_impl->active_tree()->source_frame_number();
    EXPECT_TRUE(sfn == kFirstOutputSurfaceInitSourceFrameNumber ||
                sfn == kSecondOutputSurfaceInitSourceFrameNumber ||
                sfn == kReadbackSourceFrameNumber)
        << sfn;

    // Before we react to the failed draw by initiating the forced draw
    // sequence, start a readback on the main thread and then lose the context
    // to start output surface initialization all at the same time.
    if (sfn == kFirstOutputSurfaceInitSourceFrameNumber && !did_lose_context_) {
      did_lose_context_ = true;
      LoseContext();
    }

    // Returning false will result in a forced draw.
    return DrawSwapReadbackResult::DRAW_ABORTED_CHECKERBOARD_ANIMATIONS;
  }

  virtual void DidInitializeOutputSurface(bool succeeded) OVERRIDE {
    EXPECT_TRUE(succeeded);
    if (layer_tree_host()->source_frame_number() > 0) {
      // Perform a readback right after the second output surface
      // initialization.
      char pixels[4];
      layer_tree_host()->CompositeAndReadback(&pixels, gfx::Rect(0, 0, 1, 1));
    }
  }

  virtual void InitializedRendererOnThread(LayerTreeHostImpl* host_impl,
                                           bool success) OVERRIDE {
    // -1 is for the first output surface initialization.
    int sfn = host_impl->active_tree()->source_frame_number();
    EXPECT_TRUE(sfn == -1 || sfn == kFirstOutputSurfaceInitSourceFrameNumber)
        << sfn;
  }

  virtual void DrawLayersOnThread(LayerTreeHostImpl* host_impl) OVERRIDE {
    // We should only draw the first commit after output surface initialization
    // and attempt to draw the readback commit (which will fail).
    // All others should abort because the output surface is lost.
    int sfn = host_impl->active_tree()->source_frame_number();
    EXPECT_TRUE(sfn == kForcedDrawCommitSourceFrameNumber ||
                sfn == kReadbackSourceFrameNumber)
        << sfn;
  }

  virtual void SwapBuffersOnThread(LayerTreeHostImpl* host_impl,
                                   bool result) OVERRIDE {
    // We should only swap the first commit after the second output surface
    // initialization.
    int sfn = host_impl->active_tree()->source_frame_number();
    EXPECT_TRUE(sfn == kForcedDrawCommitSourceFrameNumber) << sfn;
    EndTest();
  }

  virtual void AfterTest() OVERRIDE {}

  int did_lose_context_;
};

MULTI_THREAD_TEST_F(
    LayerTreeHostContextTestReadbackWithForcedDrawAndOutputSurfaceInit);

class ImplSidePaintingLayerTreeHostContextTest
    : public LayerTreeHostContextTest {
 public:
  virtual void InitializeSettings(LayerTreeSettings* settings) OVERRIDE {
    settings->impl_side_painting = true;
  }
};

class LayerTreeHostContextTestImplSidePainting
    : public ImplSidePaintingLayerTreeHostContextTest {
 public:
  virtual void SetupTree() OVERRIDE {
    scoped_refptr<Layer> root = Layer::Create();
    root->SetBounds(gfx::Size(10, 10));
    root->SetAnchorPoint(gfx::PointF());
    root->SetIsDrawable(true);

    scoped_refptr<PictureLayer> picture = PictureLayer::Create(&client_);
    picture->SetBounds(gfx::Size(10, 10));
    picture->SetAnchorPoint(gfx::PointF());
    picture->SetIsDrawable(true);
    root->AddChild(picture);

    layer_tree_host()->SetRootLayer(root);
    LayerTreeHostContextTest::SetupTree();
  }

  virtual void BeginTest() OVERRIDE {
    times_to_lose_during_commit_ = 1;
    PostSetNeedsCommitToMainThread();
  }

  virtual void AfterTest() OVERRIDE {}

  virtual void DidInitializeOutputSurface(bool succeeded) OVERRIDE {
    EXPECT_TRUE(succeeded);
    EndTest();
  }

 private:
  FakeContentLayerClient client_;
};

MULTI_THREAD_TEST_F(LayerTreeHostContextTestImplSidePainting);

class ScrollbarLayerLostContext : public LayerTreeHostContextTest {
 public:
  ScrollbarLayerLostContext() : commits_(0) {}

  virtual void BeginTest() OVERRIDE {
    scoped_refptr<Layer> scroll_layer = Layer::Create();
    scrollbar_layer_ =
        FakePaintedScrollbarLayer::Create(false, true, scroll_layer->id());
    scrollbar_layer_->SetBounds(gfx::Size(10, 100));
    layer_tree_host()->root_layer()->AddChild(scrollbar_layer_);
    layer_tree_host()->root_layer()->AddChild(scroll_layer);
    PostSetNeedsCommitToMainThread();
  }

  virtual void AfterTest() OVERRIDE {}

  virtual void CommitCompleteOnThread(LayerTreeHostImpl* impl) OVERRIDE {
    LayerTreeHostContextTest::CommitCompleteOnThread(impl);

    ++commits_;
    switch (commits_) {
      case 1:
        // First (regular) update, we should upload 2 resources (thumb, and
        // backtrack).
        EXPECT_EQ(1, scrollbar_layer_->update_count());
        LoseContext();
        break;
      case 2:
        // Second update, after the lost context, we should still upload 2
        // resources even if the contents haven't changed.
        EXPECT_EQ(2, scrollbar_layer_->update_count());
        EndTest();
        break;
      case 3:
        // Single thread proxy issues extra commits after context lost.
        // http://crbug.com/287250
        if (HasImplThread())
          NOTREACHED();
        break;
      default:
        NOTREACHED();
    }
  }

 private:
  int commits_;
  scoped_refptr<FakePaintedScrollbarLayer> scrollbar_layer_;
};

SINGLE_AND_MULTI_THREAD_TEST_F(ScrollbarLayerLostContext);

class UIResourceLostTest : public LayerTreeHostContextTest {
 public:
  UIResourceLostTest() : time_step_(0) {}
  virtual void InitializeSettings(LayerTreeSettings* settings) OVERRIDE {
    settings->texture_id_allocation_chunk_size = 1;
  }
  virtual void BeginTest() OVERRIDE { PostSetNeedsCommitToMainThread(); }
  virtual void AfterTest() OVERRIDE {}

  // This is called on the main thread after each commit and
  // DidActivateTreeOnThread, with the value of time_step_ at the time
  // of the call to DidActivateTreeOnThread. Similar tests will do
  // work on the main thread in DidCommit but that is unsuitable because
  // the main thread work for these tests must happen after
  // DidActivateTreeOnThread, which happens after DidCommit with impl-side
  // painting.
  virtual void StepCompleteOnMainThread(int time_step) = 0;

  // Called after DidActivateTreeOnThread. If this is done during the commit,
  // the call to StepCompleteOnMainThread will not occur until after
  // the commit completes, because the main thread is blocked.
  void PostStepCompleteToMainThread() {
    proxy()->MainThreadTaskRunner()->PostTask(
        FROM_HERE,
        base::Bind(&UIResourceLostTest::StepCompleteOnMainThreadInternal,
                   base::Unretained(this),
                   time_step_));
  }

  void PostLoseContextToImplThread() {
    EXPECT_TRUE(layer_tree_host()->proxy()->IsMainThread());
    base::SingleThreadTaskRunner* task_runner =
        HasImplThread() ? ImplThreadTaskRunner()
                        : base::MessageLoopProxy::current();
    task_runner->PostTask(FROM_HERE,
                          base::Bind(&LayerTreeHostContextTest::LoseContext,
                                     base::Unretained(this)));
  }

 protected:
  int time_step_;
  scoped_ptr<FakeScopedUIResource> ui_resource_;

 private:
  void StepCompleteOnMainThreadInternal(int step) {
    EXPECT_TRUE(layer_tree_host()->proxy()->IsMainThread());
    StepCompleteOnMainThread(step);
  }
};

class UIResourceLostTestSimple : public UIResourceLostTest {
 public:
  // This is called when the commit is complete and the new layer tree has been
  // activated.
  virtual void StepCompleteOnImplThread(LayerTreeHostImpl* impl) = 0;

  virtual void CommitCompleteOnThread(LayerTreeHostImpl* impl) OVERRIDE {
    if (!layer_tree_host()->settings().impl_side_painting) {
      StepCompleteOnImplThread(impl);
      PostStepCompleteToMainThread();
      ++time_step_;
    }
  }

  virtual void DidActivateTreeOnThread(LayerTreeHostImpl* impl) OVERRIDE {
    if (layer_tree_host()->settings().impl_side_painting) {
      StepCompleteOnImplThread(impl);
      PostStepCompleteToMainThread();
      ++time_step_;
    }
  }
};

// Losing context after an UI resource has been created.
class UIResourceLostAfterCommit : public UIResourceLostTestSimple {
 public:
  virtual void StepCompleteOnMainThread(int step) OVERRIDE {
    EXPECT_TRUE(layer_tree_host()->proxy()->IsMainThread());
    switch (step) {
      case 0:
        ui_resource_ = FakeScopedUIResource::Create(layer_tree_host());
        // Expects a valid UIResourceId.
        EXPECT_NE(0, ui_resource_->id());
        PostSetNeedsCommitToMainThread();
        break;
      case 4:
        // Release resource before ending the test.
        ui_resource_.reset();
        EndTest();
        break;
      case 5:
        // Single thread proxy issues extra commits after context lost.
        // http://crbug.com/287250
        if (HasImplThread())
          NOTREACHED();
        break;
      case 6:
        NOTREACHED();
    }
  }

  virtual void StepCompleteOnImplThread(LayerTreeHostImpl* impl) OVERRIDE {
    LayerTreeHostContextTest::CommitCompleteOnThread(impl);
    switch (time_step_) {
      case 1:
        // The resource should have been created on LTHI after the commit.
        EXPECT_NE(0u, impl->ResourceIdForUIResource(ui_resource_->id()));
        PostSetNeedsCommitToMainThread();
        break;
      case 2:
        LoseContext();
        break;
      case 3:
        // The resources should have been recreated. The bitmap callback should
        // have been called once with the resource_lost flag set to true.
        EXPECT_EQ(1, ui_resource_->lost_resource_count);
        // Resource Id on the impl-side have been recreated as well. Note
        // that the same UIResourceId persists after the context lost.
        EXPECT_NE(0u, impl->ResourceIdForUIResource(ui_resource_->id()));
        PostSetNeedsCommitToMainThread();
        break;
    }
  }
};

SINGLE_AND_MULTI_THREAD_TEST_F(UIResourceLostAfterCommit);

// Losing context before UI resource requests can be commited.  Three sequences
// of creation/deletion are considered:
// 1. Create one resource -> Context Lost => Expect the resource to have been
// created.
// 2. Delete an exisiting resource (test_id0_) -> create a second resource
// (test_id1_) -> Context Lost => Expect the test_id0_ to be removed and
// test_id1_ to have been created.
// 3. Create one resource -> Delete that same resource -> Context Lost => Expect
// the resource to not exist in the manager.
class UIResourceLostBeforeCommit : public UIResourceLostTestSimple {
 public:
  UIResourceLostBeforeCommit() : test_id0_(0), test_id1_(0) {}

  virtual void StepCompleteOnMainThread(int step) OVERRIDE {
    switch (step) {
      case 0:
        ui_resource_ = FakeScopedUIResource::Create(layer_tree_host());
        // Lose the context on the impl thread before the commit.
        PostLoseContextToImplThread();
        break;
      case 2:
        // Sequence 2:
        // Currently one resource has been created.
        test_id0_ = ui_resource_->id();
        // Delete this resource.
        ui_resource_.reset();
        // Create another resource.
        ui_resource_ = FakeScopedUIResource::Create(layer_tree_host());
        test_id1_ = ui_resource_->id();
        // Sanity check that two resource creations return different ids.
        EXPECT_NE(test_id0_, test_id1_);
        // Lose the context on the impl thread before the commit.
        PostLoseContextToImplThread();
        break;
      case 3:
        // Clear the manager of resources.
        ui_resource_.reset();
        PostSetNeedsCommitToMainThread();
        break;
      case 4:
        // Sequence 3:
        ui_resource_ = FakeScopedUIResource::Create(layer_tree_host());
        test_id0_ = ui_resource_->id();
        // Sanity check the UIResourceId should not be 0.
        EXPECT_NE(0, test_id0_);
        // Usually ScopedUIResource are deleted from the manager in their
        // destructor (so usually ui_resource_.reset()).  But here we need
        // ui_resource_ for the next step, so call DeleteUIResource directly.
        layer_tree_host()->DeleteUIResource(test_id0_);
        // Delete the resouce and then lose the context.
        PostLoseContextToImplThread();
        break;
      case 5:
        // Release resource before ending the test.
        ui_resource_.reset();
        EndTest();
        break;
      case 6:
        // Single thread proxy issues extra commits after context lost.
        // http://crbug.com/287250
        if (HasImplThread())
          NOTREACHED();
        break;
      case 8:
        NOTREACHED();
    }
  }

  virtual void StepCompleteOnImplThread(LayerTreeHostImpl* impl) OVERRIDE {
    LayerTreeHostContextTest::CommitCompleteOnThread(impl);
    switch (time_step_) {
      case 1:
        // Sequence 1 (continued):
        // The first context lost happens before the resources were created,
        // and because it resulted in no resources being destroyed, it does not
        // trigger resource re-creation.
        EXPECT_EQ(1, ui_resource_->resource_create_count);
        EXPECT_EQ(0, ui_resource_->lost_resource_count);
        // Resource Id on the impl-side has been created.
        PostSetNeedsCommitToMainThread();
        break;
      case 3:
        // Sequence 2 (continued):
        // The previous resource should have been deleted.
        EXPECT_EQ(0u, impl->ResourceIdForUIResource(test_id0_));
        if (HasImplThread()) {
          // The second resource should have been created.
          EXPECT_NE(0u, impl->ResourceIdForUIResource(test_id1_));
        } else {
          // The extra commit that happens at context lost in the single thread
          // proxy changes the timing so that the resource has been destroyed.
          // http://crbug.com/287250
          EXPECT_EQ(0u, impl->ResourceIdForUIResource(test_id1_));
        }
        // The second resource called the resource callback once and since the
        // context is lost, a "resource lost" callback was also issued.
        EXPECT_EQ(2, ui_resource_->resource_create_count);
        EXPECT_EQ(1, ui_resource_->lost_resource_count);
        break;
      case 5:
        // Sequence 3 (continued):
        // Expect the resource callback to have been called once.
        EXPECT_EQ(1, ui_resource_->resource_create_count);
        // No "resource lost" callbacks.
        EXPECT_EQ(0, ui_resource_->lost_resource_count);
        // The UI resource id should not be valid
        EXPECT_EQ(0u, impl->ResourceIdForUIResource(test_id0_));
        break;
    }
  }

 private:
  UIResourceId test_id0_;
  UIResourceId test_id1_;
};

SINGLE_AND_MULTI_THREAD_TEST_F(UIResourceLostBeforeCommit);

// Losing UI resource before the pending trees is activated but after the
// commit.  Impl-side-painting only.
class UIResourceLostBeforeActivateTree : public UIResourceLostTest {
  virtual void StepCompleteOnMainThread(int step) OVERRIDE {
    EXPECT_TRUE(layer_tree_host()->proxy()->IsMainThread());
    switch (step) {
      case 0:
        ui_resource_ = FakeScopedUIResource::Create(layer_tree_host());
        PostSetNeedsCommitToMainThread();
        break;
      case 3:
        test_id_ = ui_resource_->id();
        ui_resource_.reset();
        PostSetNeedsCommitToMainThread();
        break;
      case 5:
        // Release resource before ending the test.
        ui_resource_.reset();
        EndTest();
        break;
      case 6:
        // Make sure no extra commits happened.
        NOTREACHED();
    }
  }

  virtual void CommitCompleteOnThread(LayerTreeHostImpl* impl) OVERRIDE {
    LayerTreeHostContextTest::CommitCompleteOnThread(impl);
    switch (time_step_) {
      case 2:
        PostSetNeedsCommitToMainThread();
        break;
      case 4:
        PostSetNeedsCommitToMainThread();
        break;
    }
  }

  virtual void WillActivateTreeOnThread(LayerTreeHostImpl* impl) OVERRIDE {
    switch (time_step_) {
      case 1:
        // The resource creation callback has been called.
        EXPECT_EQ(1, ui_resource_->resource_create_count);
        // The resource is not yet lost (sanity check).
        EXPECT_EQ(0, ui_resource_->lost_resource_count);
        // The resource should not have been created yet on the impl-side.
        EXPECT_EQ(0u, impl->ResourceIdForUIResource(ui_resource_->id()));
        LoseContext();
        break;
      case 3:
        LoseContext();
        break;
    }
  }

  virtual void DidActivateTreeOnThread(LayerTreeHostImpl* impl) OVERRIDE {
    LayerTreeHostContextTest::DidActivateTreeOnThread(impl);
    switch (time_step_) {
      case 1:
        // The pending requests on the impl-side should have been processed.
        EXPECT_NE(0u, impl->ResourceIdForUIResource(ui_resource_->id()));
        break;
      case 2:
        // The "lost resource" callback should have been called once.
        EXPECT_EQ(1, ui_resource_->lost_resource_count);
        break;
      case 4:
        // The resource is deleted and should not be in the manager.  Use
        // test_id_ since ui_resource_ has been deleted.
        EXPECT_EQ(0u, impl->ResourceIdForUIResource(test_id_));
        break;
    }

    PostStepCompleteToMainThread();
    ++time_step_;
  }

 private:
  UIResourceId test_id_;
};

TEST_F(UIResourceLostBeforeActivateTree,
       RunMultiThread_DirectRenderer_ImplSidePaint) {
  RunTest(true, false, true);
}

TEST_F(UIResourceLostBeforeActivateTree,
       RunMultiThread_DelegatingRenderer_ImplSidePaint) {
  RunTest(true, true, true);
}

// Resources evicted explicitly and by visibility changes.
class UIResourceLostEviction : public UIResourceLostTestSimple {
 public:
  virtual void StepCompleteOnMainThread(int step) OVERRIDE {
    EXPECT_TRUE(layer_tree_host()->proxy()->IsMainThread());
    switch (step) {
      case 0:
        ui_resource_ = FakeScopedUIResource::Create(layer_tree_host());
        EXPECT_NE(0, ui_resource_->id());
        PostSetNeedsCommitToMainThread();
        break;
      case 2:
        // Make the tree not visible.
        PostSetVisibleToMainThread(false);
        break;
      case 3:
        // Release resource before ending the test.
        ui_resource_.reset();
        EndTest();
        break;
      case 4:
        NOTREACHED();
    }
  }

  virtual void DidSetVisibleOnImplTree(LayerTreeHostImpl* impl,
                                       bool visible) OVERRIDE {
    TestWebGraphicsContext3D* context = TestContext();
    if (!visible) {
      // All resources should have been evicted.
      ASSERT_EQ(0u, context->NumTextures());
      EXPECT_EQ(0u, impl->ResourceIdForUIResource(ui_resource_->id()));
      EXPECT_EQ(2, ui_resource_->resource_create_count);
      EXPECT_EQ(1, ui_resource_->lost_resource_count);
      // Drawing is disabled both because of the evicted resources and
      // because the renderer is not visible.
      EXPECT_FALSE(impl->CanDraw());
      // Make the renderer visible again.
      PostSetVisibleToMainThread(true);
    }
  }

  virtual void StepCompleteOnImplThread(LayerTreeHostImpl* impl) OVERRIDE {
    TestWebGraphicsContext3D* context = TestContext();
    LayerTreeHostContextTest::CommitCompleteOnThread(impl);
    switch (time_step_) {
      case 1:
        // The resource should have been created on LTHI after the commit.
        ASSERT_EQ(1u, context->NumTextures());
        EXPECT_NE(0u, impl->ResourceIdForUIResource(ui_resource_->id()));
        EXPECT_EQ(1, ui_resource_->resource_create_count);
        EXPECT_EQ(0, ui_resource_->lost_resource_count);
        EXPECT_TRUE(impl->CanDraw());
        // Evict all UI resources. This will trigger a commit.
        impl->EvictAllUIResources();
        ASSERT_EQ(0u, context->NumTextures());
        EXPECT_EQ(0u, impl->ResourceIdForUIResource(ui_resource_->id()));
        EXPECT_EQ(1, ui_resource_->resource_create_count);
        EXPECT_EQ(0, ui_resource_->lost_resource_count);
        EXPECT_FALSE(impl->CanDraw());
        break;
      case 2:
        // The resource should have been recreated.
        ASSERT_EQ(1u, context->NumTextures());
        EXPECT_NE(0u, impl->ResourceIdForUIResource(ui_resource_->id()));
        EXPECT_EQ(2, ui_resource_->resource_create_count);
        EXPECT_EQ(1, ui_resource_->lost_resource_count);
        EXPECT_TRUE(impl->CanDraw());
        break;
      case 3:
        // The resource should have been recreated after visibility was
        // restored.
        ASSERT_EQ(1u, context->NumTextures());
        EXPECT_NE(0u, impl->ResourceIdForUIResource(ui_resource_->id()));
        EXPECT_EQ(3, ui_resource_->resource_create_count);
        EXPECT_EQ(2, ui_resource_->lost_resource_count);
        EXPECT_TRUE(impl->CanDraw());
        break;
    }
  }
};

SINGLE_AND_MULTI_THREAD_TEST_F(UIResourceLostEviction);

class LayerTreeHostContextTestSurfaceCreateCallback
    : public LayerTreeHostContextTest {
 public:
  LayerTreeHostContextTestSurfaceCreateCallback()
      : LayerTreeHostContextTest(),
        layer_(FakeContentLayer::Create(&client_)) {}

  virtual void SetupTree() OVERRIDE {
    layer_->SetBounds(gfx::Size(10, 20));
    layer_tree_host()->SetRootLayer(layer_);
    LayerTreeHostContextTest::SetupTree();
  }

  virtual void BeginTest() OVERRIDE { PostSetNeedsCommitToMainThread(); }

  virtual void DidCommit() OVERRIDE {
    switch (layer_tree_host()->source_frame_number()) {
      case 1:
        EXPECT_EQ(1u, layer_->output_surface_created_count());
        layer_tree_host()->SetNeedsCommit();
        break;
      case 2:
        EXPECT_EQ(1u, layer_->output_surface_created_count());
        layer_tree_host()->SetNeedsCommit();
        break;
      case 3:
        EXPECT_EQ(1u, layer_->output_surface_created_count());
        break;
      case 4:
        EXPECT_EQ(2u, layer_->output_surface_created_count());
        layer_tree_host()->SetNeedsCommit();
        break;
    }
  }

  virtual void CommitCompleteOnThread(LayerTreeHostImpl* impl) OVERRIDE {
    LayerTreeHostContextTest::CommitCompleteOnThread(impl);
    switch (LastCommittedSourceFrameNumber(impl)) {
      case 0:
        break;
      case 1:
        break;
      case 2:
        LoseContext();
        break;
      case 3:
        EndTest();
        break;
    }
  }

  virtual void DidInitializeOutputSurface(bool succeeded) OVERRIDE {
    EXPECT_TRUE(succeeded);
  }

  virtual void AfterTest() OVERRIDE {}

 protected:
  FakeContentLayerClient client_;
  scoped_refptr<FakeContentLayer> layer_;
};

SINGLE_AND_MULTI_THREAD_TEST_F(LayerTreeHostContextTestSurfaceCreateCallback);

}  // namespace
}  // namespace cc
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root/cc/trees/layer_tree_host_unittest_context.cc

DEFINITIONS
