Remove use of deprecated MessageLoop methods in content.

content/renderer/media/html_video_element_capturer_source.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 "content/renderer/media/html_video_element_capturer_source.h"
 
+#include "base/location.h"
 #include "base/memory/ptr_util.h"
+#include "base/single_thread_task_runner.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "base/trace_event/trace_event.h"
 #include "content/public/renderer/render_thread.h"
 #include "content/renderer/media/media_stream_video_source.h"
 #include "content/renderer/media/webrtc_uma_histograms.h"
 #include "media/base/limits.h"
 #include "media/blink/webmediaplayer_impl.h"
 #include "skia/ext/platform_canvas.h"
 #include "third_party/WebKit/public/platform/WebMediaPlayer.h"
 #include "third_party/WebKit/public/platform/WebRect.h"
@@ skipping 163 matching lines @@
   if (next_capture_time_.is_null()) {
     next_capture_time_ = current_time + frame_interval;
   } else {
     next_capture_time_ += frame_interval;
     // Don't accumulate any debt if we are lagging behind - just post next frame
     // immediately and continue as normal.
     if (next_capture_time_ < current_time)
       next_capture_time_ = current_time;
   }
   // Schedule next capture.
-  base::MessageLoop::current()->PostDelayedTask(
+  base::ThreadTaskRunnerHandle::Get()->PostDelayedTask(
       FROM_HERE, base::Bind(&HtmlVideoElementCapturerSource::sendNewFrame,
                             weak_factory_.GetWeakPtr()),
       next_capture_time_ - current_time);
 }
 
 }  // namespace content