Split GpuProcessHost into GpuProcessHostUIShim, which runs on the UI...

chrome/gpu/gpu_thread.cc

 // 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.
 
 #include "chrome/gpu/gpu_thread.h"
 
 #include "build/build_config.h"
 #include "chrome/common/child_process.h"
 #include "chrome/common/gpu_messages.h"
 #include "chrome/gpu/gpu_config.h"
@@ skipping 63 matching lines @@
     // On POSIX, pass the renderer-side FD. Also mark it as auto-close so that
     // it gets closed after it has been sent.
     int renderer_fd = channel->DisownRendererFd();
     channel_handle.socket = base::FileDescriptor(renderer_fd, true);
 #endif
   }
 
   Send(new GpuHostMsg_ChannelEstablished(channel_handle));
 }
 
-void GpuThread::OnSynchronize(int renderer_id) {
-  Send(new GpuHostMsg_SynchronizeReply(renderer_id));
+void GpuThread::OnSynchronize() {
+  Send(new GpuHostMsg_SynchronizeReply());
 }
 
 void GpuThread::OnNewRenderWidgetHostView(GpuNativeWindowHandle parent_window,
                                           int32 routing_id) {
   // The GPUView class' lifetime is controlled by the host, which will send a
   // message to destroy the GpuRWHView when necessary. So we don't manage the
   // lifetime of this object.
 #if defined(OS_WIN)
   new GpuViewWin(this, parent_window, routing_id);
 #elif defined(GPU_USE_GLX)
   new GpuViewX(this, parent_window, routing_id);
 #else
   NOTIMPLEMENTED();
 #endif
 }