Added a unique command buffer ID for command buffers.

content/common/gpu/client/gpu_channel_host.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 "content/common/gpu/client/gpu_channel_host.h"
 
 #include <algorithm>
 
 #include "base/atomic_sequence_num.h"
 #include "base/bind.h"
@@ skipping 220 matching lines @@
   init_params.share_group_id =
       share_group ? share_group->route_id() : MSG_ROUTING_NONE;
   init_params.stream_id = stream_id;
   init_params.stream_priority = stream_priority;
   init_params.attribs = attribs;
   init_params.active_url = active_url;
   init_params.gpu_preference = gpu_preference;
 
   int32 route_id = GenerateRouteID();
 
+  scoped_ptr<CommandBufferProxyImpl> command_buffer =
+      make_scoped_ptr(new CommandBufferProxyImpl(this, route_id, stream_id));
+
   bool succeeded = false;
   if (!Send(new GpuChannelMsg_CreateOffscreenCommandBuffer(
-          size, init_params, route_id, &succeeded))) {
+          size, init_params, route_id, command_buffer->command_buffer_id(),
+          &succeeded))) {
     LOG(ERROR) << "Failed to send GpuChannelMsg_CreateOffscreenCommandBuffer.";
     return NULL;
   }
 
   if (!succeeded) {
     LOG(ERROR)
         << "GpuChannelMsg_CreateOffscreenCommandBuffer returned failure.";
     return NULL;
   }
 
-  scoped_ptr<CommandBufferProxyImpl> command_buffer =
-      make_scoped_ptr(new CommandBufferProxyImpl(this, route_id, stream_id));
   AddRoute(route_id, command_buffer->AsWeakPtr());
 
   return command_buffer.Pass();
 }
 
 scoped_ptr<media::JpegDecodeAccelerator> GpuChannelHost::CreateJpegDecoder(
     media::JpegDecodeAccelerator::Client* client) {
   TRACE_EVENT0("gpu", "GpuChannelHost::CreateJpegDecoder");
 
   scoped_refptr<base::SingleThreadTaskRunner> io_task_runner =
@@ skipping 195 matching lines @@
 
   listeners_.clear();
 }
 
 bool GpuChannelHost::MessageFilter::IsLost() const {
   AutoLock lock(lock_);
   return lost_;
 }
 
 }  // namespace content