Remove all remaining traces of MessageLoopProxy.

chromecast/renderer/media/chromecast_media_renderer_factory.cc

 // Copyright 2015 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 "chromecast/renderer/media/chromecast_media_renderer_factory.h"
 
 #include <utility>
 
 #include "chromecast/renderer/media/cma_renderer.h"
 #include "chromecast/renderer/media/media_pipeline_proxy.h"
@@ skipping 14 matching lines @@
 std::unique_ptr<::media::Renderer>
 ChromecastMediaRendererFactory::CreateRenderer(
     const scoped_refptr<base::SingleThreadTaskRunner>& media_task_runner,
     const scoped_refptr<base::TaskRunner>& worker_task_runner,
     ::media::AudioRendererSink* audio_renderer_sink,
     ::media::VideoRendererSink* video_renderer_sink,
     const ::media::RequestSurfaceCB& request_surface_cb) {
   // TODO(erickung): crbug.com/443956. Need to provide right LoadType.
   LoadType cma_load_type = kLoadTypeMediaSource;
   std::unique_ptr<MediaPipelineProxy> cma_media_pipeline(new MediaPipelineProxy(
-      render_frame_id_, content::RenderThread::Get()->GetIOMessageLoopProxy(),
+      render_frame_id_, content::RenderThread::Get()->GetIOTaskRunner(),
       cma_load_type));
   std::unique_ptr<CmaRenderer> cma_renderer(new CmaRenderer(
       std::move(cma_media_pipeline), video_renderer_sink, gpu_factories_));
   return std::move(cma_renderer);
 }
 
 }  // namespace media
 }  // namespace chromecast