cc: Get rid of PostSwapBuffersComplete.

cc/output/compositor_frame_sink.h

Index: cc/output/compositor_frame_sink.h
diff --git a/cc/output/compositor_frame_sink.h b/cc/output/compositor_frame_sink.h
index d642f9e48e6b6fd17ef86903f2e5299cc5943db7..ff5e92163963ef1f362f0f2515f2d1baee3cc161 100644
--- a/cc/output/compositor_frame_sink.h
+++ b/cc/output/compositor_frame_sink.h
@@ -10,7 +10,6 @@
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
-#include "base/memory/weak_ptr.h"
 #include "base/threading/thread_checker.h"
 #include "cc/base/cc_export.h"
 #include "cc/output/context_provider.h"
@@ -112,9 +111,6 @@ class CC_EXPORT CompositorFrameSink {
   virtual void OnSwapBuffersComplete();
 
  protected:
-  // This is used by both display and delegating implementations.
-  void PostSwapBuffersComplete();
-
   // Bound to the ContextProvider to hear about when it is lost and inform the
   // |client_|.
   void DidLoseCompositorFrameSink();
@@ -130,8 +126,6 @@ class CC_EXPORT CompositorFrameSink {
  private:
   void DetachFromClientInternal();
 
-  base::WeakPtrFactory<CompositorFrameSink> weak_ptr_factory_;
-
   DISALLOW_COPY_AND_ASSIGN(CompositorFrameSink);
 };