Enable strict-virtual-specifiers for iOS builds.

chrome/browser/metrics/variations/variations_request_scheduler_mobile.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_METRICS_VARIATIONS_VARIATIONS_REQUEST_SCHEDULER_MOBILE_H_
 #define CHROME_BROWSER_METRICS_VARIATIONS_VARIATIONS_REQUEST_SCHEDULER_MOBILE_H_
 
 #include "base/bind.h"
 #include "chrome/browser/metrics/variations/variations_request_scheduler.h"
 
 class PrefService;
 
 namespace chrome_variations {
 
 // A specialized VariationsRequestScheduler that manages request cycles for
 // VariationsService on mobile platforms.
 class VariationsRequestSchedulerMobile : public VariationsRequestScheduler {
  public:
   // |task} is the closure to call when the scheduler deems ready. |local_state|
   // is the PrefService that contains the time of the last fetch.
   explicit VariationsRequestSchedulerMobile(const base::Closure& task,
                                             PrefService* local_state);
-  virtual ~VariationsRequestSchedulerMobile();
+  ~VariationsRequestSchedulerMobile() override;
 
   // Base class overrides.
-  virtual void Start() override;
-  virtual void Reset() override;
-  virtual void OnAppEnterForeground() override;
+  void Start() override;
+  void Reset() override;
+  void OnAppEnterForeground() override;
 
  private:
   FRIEND_TEST_ALL_PREFIXES(VariationsRequestSchedulerMobileTest,
                            OnAppEnterForegroundNoRun);
   FRIEND_TEST_ALL_PREFIXES(VariationsRequestSchedulerMobileTest,
                            OnAppEnterForegroundRun);
   FRIEND_TEST_ALL_PREFIXES(VariationsRequestSchedulerMobileTest,
                            OnAppEnterForegroundOnStartup);
 
   // The local state instance that provides the last fetch time.
   PrefService* local_state_;
 
   // Timer used for triggering a delayed fetch for ScheduleFetch().
   base::OneShotTimer<VariationsRequestSchedulerMobile> schedule_fetch_timer_;
 
   // The time the last seed request was initiated.
   base::Time last_request_time_;
 
   DISALLOW_COPY_AND_ASSIGN(VariationsRequestSchedulerMobile);
 };
 
 }  // namespace chrome_variations
 
 #endif  // CHROME_BROWSER_METRICS_VARIATIONS_VARIATIONS_REQUEST_SCHEDULER_MOBILE_H_