Added a unique command buffer ID for command buffers.

content/common/gpu/gpu_command_buffer_stub.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_GPU_COMMAND_BUFFER_STUB_H_
 #define CONTENT_COMMON_GPU_GPU_COMMAND_BUFFER_STUB_H_
 
 #include <deque>
 #include <string>
 #include <vector>
@@ skipping 152 matching lines @@
 
   void Destroy();
 
   bool MakeCurrent();
 
   // Cleans up and sends reply if OnInitialize failed.
   void OnInitializeFailed(IPC::Message* reply_message);
 
   // Message handlers:
   void OnInitialize(base::SharedMemoryHandle shared_state_shm,
+                    uint64_t command_buffer_id,
                     IPC::Message* reply_message);
   void OnSetGetBuffer(int32 shm_id, IPC::Message* reply_message);
   void OnProduceFrontBuffer(const gpu::Mailbox& mailbox);
   void OnGetState(IPC::Message* reply_message);
   void OnWaitForTokenInRange(int32 start,
                              int32 end,
                              IPC::Message* reply_message);
   void OnWaitForGetOffsetInRange(int32 start,
                                  int32 end,
                                  IPC::Message* reply_message);
@@ skipping 115 matching lines @@
   size_t total_gpu_memory_;
   scoped_ptr<WaitForCommandState> wait_for_token_;
   scoped_ptr<WaitForCommandState> wait_for_get_offset_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuCommandBufferStub);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_GPU_GPU_COMMAND_BUFFER_STUB_H_