Change base::TickClock to a ref counted class.

extensions/browser/api/cast_channel/logger.h

Index: extensions/browser/api/cast_channel/logger.h
diff --git a/extensions/browser/api/cast_channel/logger.h b/extensions/browser/api/cast_channel/logger.h
index d7ec4f282e2990ba0edbcc60827be923401a21f9..8a185ba51f616cd35120b46a8ae647c5554b140a 100644
--- a/extensions/browser/api/cast_channel/logger.h
+++ b/extensions/browser/api/cast_channel/logger.h
@@ -37,7 +37,7 @@ class Logger : public base::RefCounted<Logger> {
   // |clock|: Clock used for generating timestamps for the events. Owned by
   // this class.
   // |unix_epoch_time_ticks|: The TimeTicks that corresponds to Unix epoch.
-  Logger(scoped_ptr<base::TickClock> clock,
+  Logger(const scoped_refptr<base::TickClock>&,
          base::TimeTicks unix_epoch_time_ticks);
 
   // For newly created sockets. Will create an event and log a
@@ -122,7 +122,7 @@ class Logger : public base::RefCounted<Logger> {
       int channel_id,
       const proto::SocketEvent& socket_event);
 
-  scoped_ptr<base::TickClock> clock_;
+  scoped_refptr<base::TickClock> clock_;
   AggregatedSocketEventLogMap aggregated_socket_events_;
   base::TimeTicks unix_epoch_time_ticks_;