cc: Get rid of PostSwapBuffersComplete.

cc/test/test_compositor_frame_sink.h

Index: cc/test/test_compositor_frame_sink.h
diff --git a/cc/test/test_compositor_frame_sink.h b/cc/test/test_compositor_frame_sink.h
index 2cd6f502dc4fe2166be8885cadffb24b902a1bb9..5c1c1bae65f8dc2e791130ddf47580513532a482 100644
--- a/cc/test/test_compositor_frame_sink.h
+++ b/cc/test/test_compositor_frame_sink.h
@@ -5,6 +5,7 @@
 #ifndef CC_TEST_TEST_COMPOSITOR_FRAME_SINK_H_
 #define CC_TEST_TEST_COMPOSITOR_FRAME_SINK_H_
 
+#include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "cc/output/compositor_frame_sink.h"
 #include "cc/output/renderer_settings.h"
@@ -16,6 +17,10 @@
 #include "cc/surfaces/surface_id_allocator.h"
 #include "cc/surfaces/surface_manager.h"
 
+namespace base {
+class SingleThreadTaskRunner;
+}
+
 namespace cc {
 class CopyOutputRequest;
 class OutputSurface;
@@ -44,7 +49,7 @@ class TestCompositorFrameSink : public CompositorFrameSink,
       SharedBitmapManager* shared_bitmap_manager,
       gpu::GpuMemoryBufferManager* gpu_memory_buffer_manager,
       const RendererSettings& renderer_settings,
-      base::SingleThreadTaskRunner* task_runner,
+      scoped_refptr<base::SingleThreadTaskRunner> task_runner,
       bool synchronous_composite,
       bool force_disable_reclaim_resources);
   ~TestCompositorFrameSink() override;
@@ -80,6 +85,8 @@ class TestCompositorFrameSink : public CompositorFrameSink,
  private:
   void DidDrawCallback();
 
+  scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
+
   FrameSinkId frame_sink_id_;
   // TODO(danakj): These don't need to be stored in unique_ptrs when
   // CompositorFrameSink is owned/destroyed on the compositor thread.
@@ -100,6 +107,8 @@ class TestCompositorFrameSink : public CompositorFrameSink,
   gfx::Size enlarge_pass_texture_amount_;
 
   std::vector<std::unique_ptr<CopyOutputRequest>> copy_requests_;
+
+  base::WeakPtrFactory<TestCompositorFrameSink> weak_ptr_factory_;
 };
 
 }  // namespace cc