Change base::TickClock to a ref counted class.

extensions/browser/api/cast_channel/logger.h

 // Copyright 2014 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 EXTENSIONS_BROWSER_API_CAST_CHANNEL_LOGGER_H_
 #define EXTENSIONS_BROWSER_API_CAST_CHANNEL_LOGGER_H_
 
 #include <deque>
 #include <map>
 
@@ skipping 19 matching lines @@
 static const int kMaxSocketsToLog = 50;
 static const int kMaxEventsPerSocket = 2000;
 
 // Logs information of each channel and sockets and exports the log as
 // a blob. Logger is done on the IO thread.
 class Logger : public base::RefCounted<Logger> {
  public:
   // |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
   // CAST_SOCKET_CREATED event.
   void LogNewSocketEvent(const CastSocket& cast_socket);
 
   void LogSocketEvent(int channel_id, proto::EventType event_type);
   void LogSocketEventWithDetails(int channel_id,
                                  proto::EventType event_type,
                                  const std::string& details);
@@ skipping 64 matching lines @@
   proto::SocketEvent CreateEvent(proto::EventType event_type);
 
   // Records |event| associated with |channel_id|.
   // If the internal map is already logging maximum number of sockets and this
   // is a new socket, the socket with the smallest channel id will be discarded.
   // Returns a reference to the AggregatedSocketEvent proto created/modified.
   proto::AggregatedSocketEvent& LogSocketEvent(
       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_;
 
   // Log proto holding global statistics.
   proto::Log log_;
 
   base::ThreadChecker thread_checker_;
 
   DISALLOW_COPY_AND_ASSIGN(Logger);
 };
 }  // namespace cast_channel
 }  // namespace api
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_API_CAST_CHANNEL_LOGGER_H_