Avoid sending duplicate flushes

content/common/gpu/client/command_buffer_proxy.h

 // Copyright (c) 2012 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_CLIENT_COMMAND_BUFFER_PROXY_H_
 #define CONTENT_COMMON_GPU_CLIENT_COMMAND_BUFFER_PROXY_H_
 #pragma once
 
 #if defined(ENABLE_GPU)
 
@@ skipping 130 matching lines @@
   State last_state_;
 
   // The shared memory area used to update state.
   gpu::CommandBufferSharedState* shared_state_;
 
   // |*this| is owned by |*channel_| and so is always outlived by it, so using a
   // raw pointer is ok.
   GpuChannelHost* channel_;
   int route_id_;
   unsigned int flush_count_;
+  int32 last_put_offset_;
 
   // Tasks to be invoked in echo responses.
   std::queue<base::Closure> echo_tasks_;
 
   base::Closure notify_repaint_task_;
 
   base::Closure channel_error_callback_;
 
   base::Callback<void(const GpuMemoryAllocation&)>
       memory_allocation_changed_callback_;
 
   GpuConsoleMessageCallback console_message_callback_;
 
   DISALLOW_COPY_AND_ASSIGN(CommandBufferProxy);
 };
 
 #endif  // ENABLE_GPU
 
 #endif  // CONTENT_COMMON_GPU_CLIENT_COMMAND_BUFFER_PROXY_H_