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 "base/command_line.h"
 #include "base/logging.h"
 #include "base/string_number_conversions.h"
 #include "base/synchronization/lock.h"
@@ skipping 223 matching lines @@
   suppress_schedule_composite_ = suppress;
 }
 
 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 269 matching lines @@
 
 scoped_refptr<cc::ContextProvider>
 RenderWidgetCompositor::OffscreenContextProviderForCompositorThread() {
   if (!contexts_compositor_thread_ ||
       contexts_compositor_thread_->DestroyedOnMainThread())
     contexts_compositor_thread_ = new CompositorThreadContextProvider;
   return contexts_compositor_thread_;
 }
 
 }  // namespace content