base: Make it possible to replace the MessageLoop's task runner

media/blink/webmediaplayer_impl.cc

 // 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 "media/blink/webmediaplayer_impl.h"
 
 #include <algorithm>
 #include <cmath>
 #include <limits>
 
@@ skipping 115 matching lines @@
       client_(client),
       delegate_(delegate),
       defer_load_cb_(params.defer_load_cb()),
       context_3d_cb_(params.context_3d_cb()),
       supports_save_(true),
       chunk_demuxer_(NULL),
       // Threaded compositing isn't enabled universally yet.
       compositor_task_runner_(
           params.compositor_task_runner()
               ? params.compositor_task_runner()
-              : base::MessageLoop::current()->task_runner()),
+              : static_cast<scoped_refptr<base::SingleThreadTaskRunner>>(
+                    base::MessageLoop::current()->task_runner())),
       compositor_(new VideoFrameCompositor(
           compositor_task_runner_,
           BIND_TO_RENDER_LOOP(&WebMediaPlayerImpl::OnNaturalSizeChanged),
           BIND_TO_RENDER_LOOP(&WebMediaPlayerImpl::OnOpacityChanged))),
       encrypted_media_support_(cdm_factory,
                                client,
                                params.media_permission(),
                                base::Bind(&WebMediaPlayerImpl::SetCdm,
                                           AsWeakPtr(),
                                           base::Bind(&IgnoreCdmAttached))),
@@ skipping 884 matching lines @@
 
   // pause() may be called after playback has ended and the HTMLMediaElement
   // requires that currentTime() == duration() after ending.  We want to ensure
   // |paused_time_| matches currentTime() in this case or a future seek() may
   // incorrectly discard what it thinks is a seek to the existing time.
   paused_time_ =
       ended_ ? pipeline_.GetMediaDuration() : pipeline_.GetMediaTime();
 }
 
 }  // namespace media