Added a unique command buffer ID for command buffers.

content/common/gpu/client/gpu_channel_host.cc

Index: content/common/gpu/client/gpu_channel_host.cc
diff --git a/content/common/gpu/client/gpu_channel_host.cc b/content/common/gpu/client/gpu_channel_host.cc
index 6b1706cdbb614fb320611d359ac5ceb45b6eb5f8..05145f85b03645a393d385cea9e64706b90a1143 100644
--- a/content/common/gpu/client/gpu_channel_host.cc
+++ b/content/common/gpu/client/gpu_channel_host.cc
@@ -238,9 +238,13 @@ scoped_ptr<CommandBufferProxyImpl> GpuChannelHost::CreateOffscreenCommandBuffer(
 
   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;
   }
@@ -251,8 +255,6 @@ scoped_ptr<CommandBufferProxyImpl> GpuChannelHost::CreateOffscreenCommandBuffer(
     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();