Mac: Don't hang gpu process on popup close under certain conditions

chrome/gpu/gpu_command_buffer_stub.h

 // Copyright (c) 2010 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 CHROME_GPU_GPU_COMMAND_BUFFER_STUB_H_
 #define CHROME_GPU_GPU_COMMAND_BUFFER_STUB_H_
 #pragma once
 
 #if defined(ENABLE_GPU)
 
@@ skipping 31 matching lines @@
 
   // IPC::Channel::Listener implementation:
   virtual void OnMessageReceived(const IPC::Message& message);
 
   // IPC::Message::Sender implementation:
   virtual bool Send(IPC::Message* msg);
 
   // Get the GLContext associated with this object.
   gpu::GPUProcessor* processor() const { return processor_.get(); }
 
+  // Identifies the various GpuCommandBufferStubs in the GPU process belonging
+  // to the same renderer process.
   int32 route_id() const { return route_id_; }
 
+  // Identifies the various render views in the renderer process.
+  int32 renderer_route_id() const { return renderer_id_; }
+
 #if defined(OS_WIN)
   // Called only by the compositor window's window proc
   void OnCompositorWindowPainted();
 #endif  // defined(OS_WIN)
 
 #if defined(OS_MACOSX)
   // Called only by the GpuChannel.
   void AcceleratedSurfaceBuffersSwapped(uint64 swap_buffers_count);
 #endif  // defined(OS_MACOSX)
 
@@ skipping 48 matching lines @@
 
   scoped_ptr<gpu::CommandBufferService> command_buffer_;
   scoped_ptr<gpu::GPUProcessor> processor_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuCommandBufferStub);
 };
 
 #endif  // defined(ENABLE_GPU)
 
 #endif  // CHROME_GPU_GPU_COMMAND_BUFFER_STUB_H_