Add flow control between renderer and GPU processes, and, on Mac OS X,...

chrome/gpu/gpu_command_buffer_stub.h

 // Copyright (c) 2010 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 CHROME_GPU_GPU_COMMAND_BUFFER_STUB_H_
 #define CHROME_GPU_GPU_COMMAND_BUFFER_STUB_H_
 #pragma once
 
 #if defined(ENABLE_GPU)
 
@@ skipping 33 matching lines @@
   virtual void OnMessageReceived(const IPC::Message& message);
 
   // IPC::Message::Sender implementation:
   virtual bool Send(IPC::Message* msg);
 
   // Get the GLContext associated with this object.
   gpu::GPUProcessor* processor() const { return processor_.get(); }
 
   int32 route_id() const { return route_id_; }
 
+#if defined(OS_MACOSX)
+  // Called only by the GpuChannel.
+  void AcceleratedSurfaceBuffersSwapped(uint64 swap_buffers_count);
+#endif
+
  private:
   // Message handlers:
   void OnInitialize(int32 size, base::SharedMemoryHandle* ring_buffer);
   void OnGetState(gpu::CommandBuffer::State* state);
   void OnAsyncGetState();
   void OnFlush(int32 put_offset, gpu::CommandBuffer::State* state);
   void OnAsyncFlush(int32 put_offset);
   void OnCreateTransferBuffer(int32 size, int32* id);
   void OnDestroyTransferBuffer(int32 id);
   void OnGetTransferBuffer(int32 id,
@@ skipping 28 matching lines @@
 
   scoped_ptr<gpu::CommandBufferService> command_buffer_;
   scoped_ptr<gpu::GPUProcessor> processor_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuCommandBufferStub);
 };
 
 #endif  // ENABLE_GPU
 
 #endif  // CHROME_GPU_GPU_COMMAND_BUFFER_STUB_H_