Change base::TickClock to a ref counted class.

chrome/browser/chromeos/system/automatic_reboot_manager.h

 // Copyright (c) 2013 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 CHROME_BROWSER_CHROMEOS_SYSTEM_AUTOMATIC_REBOOT_MANAGER_H_
 #define CHROME_BROWSER_CHROMEOS_SYSTEM_AUTOMATIC_REBOOT_MANAGER_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 72 matching lines @@
     SystemEventTimes(const base::TimeDelta& uptime,
                      const base::TimeDelta& update_reboot_needed_uptime);
 
     bool has_boot_time;
     base::TimeTicks boot_time;
 
     bool has_update_reboot_needed_time;
     base::TimeTicks update_reboot_needed_time;
   };
 
-  explicit AutomaticRebootManager(scoped_ptr<base::TickClock> clock);
+  explicit AutomaticRebootManager(const scoped_refptr<base::TickClock>& clock);
   virtual ~AutomaticRebootManager();
 
   void AddObserver(AutomaticRebootManagerObserver* observer);
   void RemoveObserver(AutomaticRebootManagerObserver* observer);
 
   // PowerManagerClient::Observer:
   virtual void SuspendDone(const base::TimeDelta& sleep_duration) override;
 
   // UpdateEngineClient::Observer:
   virtual void UpdateStatusChanged(
@@ skipping 26 matching lines @@
   // Called whenever the status of the criteria inhibiting reboots may have
   // changed. Reboots immediately if a reboot has actually been requested and
   // none of the criteria inhibiting it apply anymore. Otherwise, does nothing.
   // If |ignore_session|, a session in progress does not inhibit reboots.
   void MaybeReboot(bool ignore_session);
 
   // Reboots immediately.
   void Reboot();
 
   // A clock that can be mocked in tests to fast-forward time.
-  scoped_ptr<base::TickClock> clock_;
+  scoped_refptr<base::TickClock> clock_;
 
   PrefChangeRegistrar local_state_registrar_;
 
   content::NotificationRegistrar notification_registrar_;
 
   // Fires when the user has been idle on the login screen for a set amount of
   // time.
   scoped_ptr<base::OneShotTimer<AutomaticRebootManager> >
       login_screen_idle_timer_;
 
@@ skipping 17 matching lines @@
 
   base::WeakPtrFactory<AutomaticRebootManager> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(AutomaticRebootManager);
 };
 
 }  // namespace system
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_SYSTEM_AUTOMATIC_REBOOT_MANAGER_H_