Allow FlushSyncs to short circuit

content/common/gpu/gpu_command_buffer_stub.h

 // Copyright (c) 2011 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.
 
 #ifndef CONTENT_COMMON_GPU_GPU_COMMAND_BUFFER_STUB_H_
 #define CONTENT_COMMON_GPU_GPU_COMMAND_BUFFER_STUB_H_
 #pragma once
 
 #if defined(ENABLE_GPU)
 
@@ skipping 74 matching lines @@
   void OnInitializeFailed(IPC::Message* reply_message);
 
   // Message handlers:
   void OnInitialize(base::SharedMemoryHandle ring_buffer,
                     int32 size,
                     IPC::Message* reply_message);
   void OnSetParent(int32 parent_route_id,
                    uint32 parent_texture_id,
                    IPC::Message* reply_message);
   void OnGetState(IPC::Message* reply_message);
-  void OnFlush(int32 put_offset,
-               int32 last_known_get,
-               uint32 flush_count,
-               IPC::Message* reply_message);
+  void OnGetStateFast(IPC::Message* reply_message);
   void OnAsyncFlush(int32 put_offset, uint32 flush_count);
   void OnEcho(const IPC::Message& message);
   void OnRescheduled();
   void OnCreateTransferBuffer(int32 size,
                               int32 id_request,
                               IPC::Message* reply_message);
   void OnRegisterTransferBuffer(base::SharedMemoryHandle transfer_buffer,
                                 size_t size,
                                 int32 id_request,
                                 IPC::Message* reply_message);
@@ skipping 61 matching lines @@
   IDMap<GpuVideoDecodeAccelerator, IDMapOwnPointer> video_decoders_;
 
   ScopedRunnableMethodFactory<GpuCommandBufferStub> task_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuCommandBufferStub);
 };
 
 #endif  // defined(ENABLE_GPU)
 
 #endif  // CONTENT_COMMON_GPU_GPU_COMMAND_BUFFER_STUB_H_