gpu: Associate all GpuMemoryBuffers with unique IDs.

content/common/child_process_host_impl.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_CHILD_PROCESS_HOST_IMPL_H_
 #define CONTENT_COMMON_CHILD_PROCESS_HOST_IMPL_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 67 matching lines @@
   // Message handlers:
   void OnShutdownRequest();
   void OnAllocateSharedMemory(uint32 buffer_size,
                               base::SharedMemoryHandle* handle);
   void OnAllocateGpuMemoryBuffer(uint32 width,
                                  uint32 height,
                                  gfx::GpuMemoryBuffer::Format format,
                                  gfx::GpuMemoryBuffer::Usage usage,
                                  IPC::Message* reply);
   void OnDeletedGpuMemoryBuffer(gfx::GpuMemoryBufferType type,
-                                const gfx::GpuMemoryBufferId& id);
+                                gfx::GpuMemoryBufferId id);
 
   void GpuMemoryBufferAllocated(IPC::Message* reply,
                                 const gfx::GpuMemoryBufferHandle& handle);
 
   ChildProcessHostDelegate* delegate_;
   base::ProcessHandle peer_handle_;
   bool opening_channel_;  // True while we're waiting the channel to be opened.
   scoped_ptr<IPC::Channel> channel_;
   std::string channel_id_;
 
   // Holds all the IPC message filters.  Since this object lives on the IO
   // thread, we don't have a IPC::ChannelProxy and so we manage filters
   // manually.
   std::vector<scoped_refptr<IPC::MessageFilter> > filters_;
 
   DISALLOW_COPY_AND_ASSIGN(ChildProcessHostImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_CHILD_PROCESS_HOST_IMPL_H_