gpu: reference target surfaces through a globally unique surface id.

content/common/gpu/gpu_channel.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_CHANNEL_H_
 #define CONTENT_COMMON_GPU_GPU_CHANNEL_H_
 #pragma once
 
 #include <deque>
 #include <string>
@@ skipping 66 matching lines @@
   bool IsScheduled();
 
   // This is called when a command buffer transitions from the unscheduled
   // state to the scheduled state, which potentially means the channel
   // transitions from the unscheduled to the scheduled state. When this occurs
   // deferred IPC messaged are handled.
   void OnScheduled();
 
   void CreateViewCommandBuffer(
       gfx::PluginWindowHandle window,
-      int32 render_view_id,
+      int32 surface_id,
       const GPUCreateCommandBufferConfig& init_params,
       int32* route_id);
 
   gfx::GLShareGroup* share_group() const { return share_group_.get(); }
 
   GpuCommandBufferStub* LookupCommandBuffer(int32 route_id);
 
   void LoseAllContexts();
 
   // Destroy channel and all contained contexts.
@@ skipping 75 matching lines @@
   bool handle_messages_scheduled_;
   bool processed_get_state_fast_;
   int32 num_contexts_preferring_discrete_gpu_;
 
   base::WeakPtrFactory<GpuChannel> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuChannel);
 };
 
 #endif  // CONTENT_COMMON_GPU_GPU_CHANNEL_H_