Added a unique command buffer ID for command buffers.

content/common/gpu/gpu_command_buffer_stub.cc

 // 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.
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/command_line.h"
 #include "base/hash.h"
 #include "base/json/json_writer.h"
 #include "base/memory/shared_memory.h"
@@ skipping 462 matching lines @@
 
 void GpuCommandBufferStub::OnInitializeFailed(IPC::Message* reply_message) {
   Destroy();
   GpuCommandBufferMsg_Initialize::WriteReplyParams(
       reply_message, false, gpu::Capabilities());
   Send(reply_message);
 }
 
 void GpuCommandBufferStub::OnInitialize(
     base::SharedMemoryHandle shared_state_handle,
+    uint64_t command_buffer_id,
     IPC::Message* reply_message) {
   TRACE_EVENT0("gpu", "GpuCommandBufferStub::OnInitialize");
   DCHECK(!command_buffer_.get());
 
   scoped_ptr<base::SharedMemory> shared_state_shm(
       new base::SharedMemory(shared_state_handle, false));
 
   command_buffer_.reset(new gpu::CommandBufferService(
-      context_group_->transfer_buffer_manager()));
+      context_group_->transfer_buffer_manager(),
+      gpu::kCommandBufferNamespace_GpuIO,
+      command_buffer_id));
 
   bool result = command_buffer_->Initialize();
   DCHECK(result);
 
   decoder_.reset(::gpu::gles2::GLES2Decoder::Create(context_group_.get()));
   scheduler_.reset(new gpu::GpuScheduler(command_buffer_.get(),
                                          decoder_.get(),
                                          decoder_.get()));
   if (preemption_flag_.get())
     scheduler_->SetPreemptByFlag(preemption_flag_);
@@ skipping 676 matching lines @@
                                                     result));
 }
 
 void GpuCommandBufferStub::SendUpdateVSyncParameters(base::TimeTicks timebase,
                                                      base::TimeDelta interval) {
   Send(new GpuCommandBufferMsg_UpdateVSyncParameters(route_id_, timebase,
                                                      interval));
 }
 
 }  // namespace content