cc: Get rid of PostSwapBuffersComplete.

cc/output/output_surface.cc

Index: cc/output/output_surface.cc
diff --git a/cc/output/output_surface.cc b/cc/output/output_surface.cc
index 1a81af3e8548fa7660dbbae0e4c4129f5ddbf3e9..21d4acb494e2b8ed031ebdff6b32b9eb779b6554 100644
--- a/cc/output/output_surface.cc
+++ b/cc/output/output_surface.cc
@@ -208,12 +208,6 @@ void OutputSurface::Reshape(const gfx::Size& size,
     software_device_->Resize(size, scale_factor);
 }
 
-void OutputSurface::PostSwapBuffersComplete() {
-  base::ThreadTaskRunnerHandle::Get()->PostTask(
-      FROM_HERE, base::Bind(&OutputSurface::OnSwapBuffersComplete,
-                            weak_ptr_factory_.GetWeakPtr()));
-}
-
 // We don't post tasks bound to the client directly since they might run
 // after the OutputSurface has been destroyed.
 void OutputSurface::OnSwapBuffersComplete() {