Move WebMediaPlayer to frame loading queue.

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>
 #include <string>
@@ skipping 171 matching lines @@
     const WebMediaPlayerParams& params)
     : frame_(frame),
       delegate_state_(DelegateState::GONE),
       is_idle_(false),
       must_suspend_(false),
       network_state_(WebMediaPlayer::NetworkStateEmpty),
       ready_state_(WebMediaPlayer::ReadyStateHaveNothing),
       highest_ready_state_(WebMediaPlayer::ReadyStateHaveNothing),
       preload_(MultibufferDataSource::AUTO),
       buffering_strategy_(MultibufferDataSource::BUFFERING_STRATEGY_NORMAL),
-      main_task_runner_(base::ThreadTaskRunnerHandle::Get()),
+      main_task_runner_(
+          blink::TaskRunnerHelper::get(blink::TaskType::Media, frame)),

[haraken, 2016/12/07 00:19:26]

How can media/blink access TaskRunnerHelper?

[altimin, 2016/12/07 12:10:56]

Acknowledged.

       media_task_runner_(params.media_task_runner()),
       worker_task_runner_(params.worker_task_runner()),
       media_log_(params.media_log()),
       pipeline_(media_task_runner_, media_log_.get()),
       pipeline_controller_(
           &pipeline_,
           base::Bind(&WebMediaPlayerImpl::CreateRenderer,
                      base::Unretained(this)),
           base::Bind(&WebMediaPlayerImpl::OnPipelineSeeked, AsWeakPtr()),
           base::Bind(&WebMediaPlayerImpl::OnPipelineSuspended, AsWeakPtr()),
@@ skipping 1783 matching lines @@
     watch_time_reporter_->OnShown();
 }
 
 bool WebMediaPlayerImpl::IsHidden() const {
   DCHECK(main_task_runner_->BelongsToCurrentThread());
 
   return delegate_ && delegate_->IsHidden();
 }
 
 }  // namespace media