discard_backbuffer_count  462 cc/output/output_surface_unittest.cc   EXPECT_EQ(0, software_output_device->discard_backbuffer_count());
discard_backbuffer_count  466 cc/output/output_surface_unittest.cc   EXPECT_EQ(0, software_output_device->discard_backbuffer_count());
discard_backbuffer_count  470 cc/output/output_surface_unittest.cc   EXPECT_EQ(1, software_output_device->discard_backbuffer_count());