Enable strict-virtual-specifiers for iOS builds.

components/policy/core/common/policy_loader_ios.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 COMPONENTS_POLICY_CORE_COMMON_POLICY_LOADER_IOS_H_
 #define COMPONENTS_POLICY_CORE_COMMON_POLICY_LOADER_IOS_H_
 
 #include "base/basictypes.h"
 #include "base/mac/scoped_nsobject.h"
 #include "base/memory/weak_ptr.h"
 #include "base/time/time.h"
 #include "components/policy/core/common/async_policy_loader.h"
 #include "components/policy/policy_export.h"
 
 namespace policy {
 
 // A policy loader that loads policy from the managed app configuration
 // introduced in iOS 7.
 class POLICY_EXPORT PolicyLoaderIOS : public AsyncPolicyLoader {
  public:
   explicit PolicyLoaderIOS(
       scoped_refptr<base::SequencedTaskRunner> task_runner);
-  virtual ~PolicyLoaderIOS();
+  ~PolicyLoaderIOS() override;
 
   // AsyncPolicyLoader implementation.
-  virtual void InitOnBackgroundThread() override;
-  virtual scoped_ptr<PolicyBundle> Load() override;
-  virtual base::Time LastModificationTime() override;
+  void InitOnBackgroundThread() override;
+  scoped_ptr<PolicyBundle> Load() override;
+  base::Time LastModificationTime() override;
 
  private:
   void UserDefaultsChanged();
 
   // Loads the Chrome policies in |dictionary| into the given |bundle|.
   static void LoadNSDictionaryToPolicyBundle(NSDictionary* dictionary,
                                              PolicyBundle* bundle);
 
   // Used to manage the registration for NSNotificationCenter notifications.
   base::scoped_nsobject<id> notification_observer_;
 
   // Timestamp of the last notification.
   // Used to coalesce repeated notifications into a single Load() call.
   base::Time last_notification_time_;
 
   // Used to Bind() a WeakPtr to |this| for the callback passed to the
   // |notification_observer_|.
   base::WeakPtrFactory<PolicyLoaderIOS> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(PolicyLoaderIOS);
 };
 
 }  // namespace policy
 
 #endif  // COMPONENTS_POLICY_CORE_COMMON_POLICY_LOADER_IOS_H_