Revert of Use timer task queue for RenderMediaLog

content/renderer/media/render_media_log.h

 // 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.
 
 #ifndef CONTENT_RENDERER_MEDIA_RENDER_MEDIA_LOG_H_
 #define CONTENT_RENDERER_MEDIA_RENDER_MEDIA_LOG_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 15 matching lines @@
 //
 // It also caches the last error events to support renderer-side reporting to
 // entities like HTMLMediaElement and devtools console.
 //
 // To minimize the number of events sent over the wire, only the latest event
 // added is sent for high frequency events (e.g., BUFFERED_EXTENTS_CHANGED).
 //
 // It must be constructed on the render thread.
 class CONTENT_EXPORT RenderMediaLog : public media::MediaLog {
  public:
-  explicit RenderMediaLog(
-      const GURL& security_origin,
-      scoped_refptr<base::SingleThreadTaskRunner> task_runner);
+  explicit RenderMediaLog(const GURL& security_origin);
 
   // MediaLog implementation.
   void AddEvent(std::unique_ptr<media::MediaLogEvent> event) override;
   std::string GetLastErrorMessage() override;
   void RecordRapporWithSecurityOrigin(const std::string& metric) override;
 
   // Will reset |last_ipc_send_time_| with the value of NowTicks().
   void SetTickClockForTesting(std::unique_ptr<base::TickClock> tick_clock);
   void SetTaskRunnerForTesting(
       const scoped_refptr<base::SingleThreadTaskRunner>& task_runner);
@@ skipping 31 matching lines @@
 
   // Holds a copy of the most recent PIPELINE_ERROR, if any.
   std::unique_ptr<media::MediaLogEvent> last_pipeline_error_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderMediaLog);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_RENDER_MEDIA_LOG_H_