Remove CompositorThread dependency on WebThread

content/renderer/gpu/render_widget_compositor.cc

 // Copyright (c) 2013 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/renderer/gpu/render_widget_compositor.h"
 
 #include <limits>
 
 #include "base/command_line.h"
 #include "base/logging.h"
@@ skipping 273 matching lines @@
   layer_tree_host_->enableHidingTopControls(enable);
 }
 
 bool RenderWidgetCompositor::initialize(cc::LayerTreeSettings settings) {
   scoped_ptr<cc::Thread> impl_thread;
   CompositorThread* compositor_thread =
       RenderThreadImpl::current()->compositor_thread();
   threaded_ = !!compositor_thread;
   if (compositor_thread)
     impl_thread = cc::ThreadImpl::createForDifferentThread(
-        compositor_thread->message_loop()->message_loop_proxy());
+        compositor_thread->message_loop_proxy());
   layer_tree_host_ = cc::LayerTreeHost::create(this,
                                                settings,
                                                impl_thread.Pass());
   return layer_tree_host_;
 }
 
 void RenderWidgetCompositor::setSurfaceReady() {
   layer_tree_host_->setSurfaceReady();
 }
 
@@ skipping 188 matching lines @@
   return RenderThreadImpl::current()->OffscreenContextProviderForMainThread();
 }
 
 scoped_refptr<cc::ContextProvider>
 RenderWidgetCompositor::OffscreenContextProviderForCompositorThread() {
   return RenderThreadImpl::current()->
       OffscreenContextProviderForCompositorThread();
 }
 
 }  // namespace content