cc: Use correct message loop proxy in BlockingTaskRunner

cc/layers/delegated_renderer_layer.cc

 // Copyright 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.
 
 #include "cc/layers/delegated_renderer_layer.h"
 
 #include "cc/layers/delegated_renderer_layer_impl.h"
 #include "cc/output/delegated_frame_data.h"
 #include "cc/quads/render_pass_draw_quad.h"
 #include "cc/trees/blocking_task_runner.h"
 #include "cc/trees/layer_tree_host.h"
 
 namespace cc {
 
 scoped_refptr<DelegatedRendererLayer> DelegatedRendererLayer::Create(
     const scoped_refptr<DelegatedFrameProvider>& frame_provider) {
   return scoped_refptr<DelegatedRendererLayer>(
       new DelegatedRendererLayer(frame_provider));
 }
 
 DelegatedRendererLayer::DelegatedRendererLayer(
     const scoped_refptr<DelegatedFrameProvider>& frame_provider)
     : Layer(),
       frame_provider_(frame_provider),
       should_collect_new_frame_(true),
       frame_data_(NULL),
-      main_thread_runner_(BlockingTaskRunner::current()),
       weak_ptrs_(this) {
   frame_provider_->AddObserver(this);
 }
 
 DelegatedRendererLayer::~DelegatedRendererLayer() {
   frame_provider_->RemoveObserver(this);
 }
 
 scoped_ptr<LayerImpl> DelegatedRendererLayer::CreateLayerImpl(
     LayerTreeImpl* tree_impl) {
@@ skipping 58 matching lines @@
 
   SetNeedsPushProperties();
   return true;
 }
 
 bool DelegatedRendererLayer::HasDelegatedContent() const {
   return true;
 }
 
 }  // namespace cc