Change base::TickClock to a ref counted class.

chrome/browser/chromeos/system/automatic_reboot_manager.cc

 // 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.
 
 #include "chrome/browser/chromeos/system/automatic_reboot_manager.h"
 
 #include <fcntl.h>
 #include <sys/stat.h>
 #include <sys/types.h>
 
@@ skipping 130 matching lines @@
   has_boot_time = true;
   if (update_reboot_needed_uptime == kZeroTimeDelta)
     return;
   // Calculate the time at which an update was applied and a reboot became
   // necessary in base::TimeTicks::Now() ticks.
   update_reboot_needed_time = boot_time + update_reboot_needed_uptime;
   has_update_reboot_needed_time = true;
 }
 
 AutomaticRebootManager::AutomaticRebootManager(
-    scoped_ptr<base::TickClock> clock)
-    : clock_(clock.Pass()),
+    const scoped_refptr<base::TickClock>& clock)
+    : clock_(clock),
       have_boot_time_(false),
       have_update_reboot_needed_time_(false),
       reboot_requested_(false),
       weak_ptr_factory_(this) {
   local_state_registrar_.Init(g_browser_process->local_state());
   local_state_registrar_.Add(prefs::kUptimeLimit,
                              base::Bind(&AutomaticRebootManager::Reschedule,
                                         base::Unretained(this)));
   local_state_registrar_.Add(prefs::kRebootAfterUpdate,
                              base::Bind(&AutomaticRebootManager::Reschedule,
@@ skipping 247 matching lines @@
   }
 
   login_screen_idle_timer_.reset();
   grace_start_timer_.reset();
   grace_end_timer_.reset();
   DBusThreadManager::Get()->GetPowerManagerClient()->RequestRestart();
 }
 
 }  // namespace system
 }  // namespace chromeos