Ozone: Avoid blocking in Swapbuffer Call.

cc/output/output_surface.cc

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/output/output_surface.h"
 
 #include "base/bind.h"
 #include "base/debug/trace_event.h"
 #include "base/message_loop/message_loop.h"
 #include "cc/output/managed_memory_policy.h"
@@ skipping 200 matching lines @@
       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() {
   client_->DidSwapBuffersComplete();
 }
 
+void OutputSurface::OnPageFlipComplete() {
+}
+
 void OutputSurface::SetMemoryPolicy(const ManagedMemoryPolicy& policy) {
   TRACE_EVENT1("cc", "OutputSurface::SetMemoryPolicy",
                "bytes_limit_when_visible", policy.bytes_limit_when_visible);
   // Just ignore the memory manager when it says to set the limit to zero
   // bytes. This will happen when the memory manager thinks that the renderer
   // is not visible (which the renderer knows better).
   if (policy.bytes_limit_when_visible)
     client_->SetMemoryPolicy(policy);
 }
 
 }  // namespace cc