Revert of Use timer task queue for RenderMediaLog

content/renderer/media/render_media_log.cc

 // Copyright (c) 2012 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/render_media_log.h"
 
 #include <sstream>
 
 #include "base/bind.h"
 #include "base/location.h"
@@ skipping 24 matching lines @@
              event->type != media::MediaLogEvent::NETWORK_ACTIVITY_SET) {
     MEDIA_EVENT_LOG_UTILITY << "MediaEvent: "
                             << media::MediaLog::MediaEventToLogString(*event);
   }
 }
 
 }  // namespace
 
 namespace content {
 
-RenderMediaLog::RenderMediaLog(
-    const GURL& security_origin,
-    scoped_refptr<base::SingleThreadTaskRunner> task_runner)
+RenderMediaLog::RenderMediaLog(const GURL& security_origin)
     : security_origin_(security_origin),
-      task_runner_(task_runner),
+      task_runner_(base::ThreadTaskRunnerHandle::Get()),
       tick_clock_(new base::DefaultTickClock()),
       last_ipc_send_time_(tick_clock_->NowTicks()),
       ipc_send_pending_(false) {
   DCHECK(RenderThread::Get())
       << "RenderMediaLog must be constructed on the render thread";
 }
 
 void RenderMediaLog::AddEvent(std::unique_ptr<media::MediaLogEvent> event) {
   Log(event.get());
 
@@ skipping 122 matching lines @@
   tick_clock_.swap(tick_clock);
   last_ipc_send_time_ = tick_clock_->NowTicks();
 }
 
 void RenderMediaLog::SetTaskRunnerForTesting(
     const scoped_refptr<base::SingleThreadTaskRunner>& task_runner) {
   task_runner_ = task_runner;
 }
 
 }  // namespace content