Change base::TickClock to a ref counted class.

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 <vector>
 
 #include "base/time/time.h"
@@ skipping 12 matching lines @@
 // 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).
 class CONTENT_EXPORT RenderMediaLog : public media::MediaLog {
  public:
   RenderMediaLog();
 
   // MediaLog implementation.
   virtual void AddEvent(scoped_ptr<media::MediaLogEvent> event) override;
 
   // Will reset |last_ipc_send_time_| with the value of NowTicks().
-  void SetTickClockForTesting(scoped_ptr<base::TickClock> tick_clock);
+  void SetTickClockForTesting(const scoped_refptr<base::TickClock>& tick_clock);
 
  private:
   virtual ~RenderMediaLog();
 
   scoped_refptr<base::MessageLoopProxy> render_loop_;
-  scoped_ptr<base::TickClock> tick_clock_;
+  scoped_refptr<base::TickClock> tick_clock_;
   base::TimeTicks last_ipc_send_time_;
   std::vector<media::MediaLogEvent> queued_media_events_;
 
   // Limits the number buffered extents changed events we send over IPC to one.
   scoped_ptr<media::MediaLogEvent> last_buffered_extents_changed_event_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderMediaLog);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_RENDER_MEDIA_LOG_H_