ensure_backbuffer_count  461 cc/output/output_surface_unittest.cc   EXPECT_EQ(0, software_output_device->ensure_backbuffer_count());
ensure_backbuffer_count  465 cc/output/output_surface_unittest.cc   EXPECT_EQ(1, software_output_device->ensure_backbuffer_count());
ensure_backbuffer_count  469 cc/output/output_surface_unittest.cc   EXPECT_EQ(1, software_output_device->ensure_backbuffer_count());