Change base::TickClock to a ref counted class.

chrome/browser/chromeos/system/automatic_reboot_manager_unittest.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 <string>
 #include <utility>
 
 #include "ash/shell.h"
@@ skipping 86 matching lines @@
                       std::vector<std::pair<base::TimeTicks, base::Closure> >,
                       TemporalOrder> tasks_;
 
   DISALLOW_COPY_AND_ASSIGN(MockTimeSingleThreadTaskRunner);
 };
 
 class MockTimeTickClock : public base::TickClock {
  public:
   explicit MockTimeTickClock(
       scoped_refptr<MockTimeSingleThreadTaskRunner> task_runner);
-  virtual ~MockTimeTickClock();
 
   // base::TickClock:
   virtual base::TimeTicks NowTicks() override;
 
  private:
+  virtual ~MockTimeTickClock();
+
   scoped_refptr<MockTimeSingleThreadTaskRunner> task_runner_;
 
   DISALLOW_COPY_AND_ASSIGN(MockTimeTickClock);
 };
 
 }  // namespace
 
 class AutomaticRebootManagerBasicTest : public testing::Test {
  protected:
   typedef base::OneShotTimer<AutomaticRebootManager> Timer;
@@ skipping 1929 matching lines @@
 INSTANTIATE_TEST_CASE_P(
     AutomaticRebootManagerTestInstance,
     AutomaticRebootManagerTest,
     ::testing::Values(
         AUTOMATIC_REBOOT_MANAGER_TEST_SCENARIO_LOGIN_SCREEN,
         AUTOMATIC_REBOOT_MANAGER_TEST_SCENARIO_KIOSK_APP_SESSION,
         AUTOMATIC_REBOOT_MANAGER_TEST_SCENARIO_NON_KIOSK_APP_SESSION));
 
 }  // namespace system
 }  // namespace chromeos