cc: Use correct message loop proxy in BlockingTaskRunner

cc/test/pixel_test.h

 // Copyright 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 "base/file_util.h"
 #include "cc/output/gl_renderer.h"
 #include "cc/output/software_renderer.h"
 #include "cc/quads/render_pass.h"
 #include "cc/test/pixel_comparator.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ skipping 27 matching lines @@
       const base::FilePath& ref_file,
       const PixelComparator& comparator);
 
   LayerTreeSettings settings_;
   gfx::Size device_viewport_size_;
   bool disable_picture_quad_image_filtering_;
   class PixelTestRendererClient;
   scoped_ptr<FakeOutputSurfaceClient> output_surface_client_;
   scoped_ptr<OutputSurface> output_surface_;
   scoped_ptr<SharedBitmapManager> shared_bitmap_manager_;
+  scoped_ptr<BlockingTaskRunner> main_thread_task_runner_;
   scoped_ptr<ResourceProvider> resource_provider_;
   scoped_ptr<TextureMailboxDeleter> texture_mailbox_deleter_;
   scoped_ptr<DirectRenderer> renderer_;
   scoped_ptr<SkBitmap> result_bitmap_;
   gfx::Vector2d external_device_viewport_offset_;
   gfx::Rect external_device_clip_rect_;
 
   void SetUpGLRenderer(bool use_skia_gpu_backend);
   void SetUpSoftwareRenderer();
 
@@ skipping 123 matching lines @@
     SoftwareRendererWithExpandedViewport>::ExpandedViewport() const {
   return true;
 }
 
 typedef RendererPixelTest<GLRenderer> GLRendererPixelTest;
 typedef RendererPixelTest<SoftwareRenderer> SoftwareRendererPixelTest;
 
 }  // namespace cc
 
 #endif  // CC_TEST_PIXEL_TEST_H_