Standardize usage of virtual/override/final in chrome/browser/sync/

chrome/browser/sync/test/integration/multi_client_status_change_checker.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 CHROME_BROWSER_SYNC_TEST_INTEGRATION_MULTI_CLIENT_STATUS_CHANGE_CHECKER_H_
 #define CHROME_BROWSER_SYNC_TEST_INTEGRATION_MULTI_CLIENT_STATUS_CHANGE_CHECKER_H_
 
 #include <vector>
 
 #include "base/compiler_specific.h"
 #include "base/time/time.h"
 #include "chrome/browser/sync/profile_sync_service_observer.h"
 #include "chrome/browser/sync/test/integration/status_change_checker.h"
 
 class ProfileSyncService;
 
 // This class provides some common functionality for StatusChangeCheckers that
 // observe many ProfileSyncServices.  This class is abstract.  Its descendants
 // are expected to provide additional functionality.
 class MultiClientStatusChangeChecker
   : public StatusChangeChecker,
     public ProfileSyncServiceObserver {
  public:
   explicit MultiClientStatusChangeChecker(
       std::vector<ProfileSyncService*> services);
-  virtual ~MultiClientStatusChangeChecker();
+  ~MultiClientStatusChangeChecker() override;
 
   // Called when waiting times out.
   void OnTimeout();
 
   // Blocks until the exit condition is satisfied or a timeout occurs.
   void Wait();
 
   // ProfileSyncServiceObserver implementation.
-  virtual void OnStateChanged() override;
+  void OnStateChanged() override;
 
   // StatusChangeChecker implementations and stubs.
   virtual bool IsExitConditionSatisfied() = 0;
   virtual std::string GetDebugMessage() const = 0;
 
  protected:
   const std::vector<ProfileSyncService*>& services() { return services_; }
 
  private:
   std::vector<ProfileSyncService*> services_;
 };
 
 #endif  // CHROME_BROWSER_SYNC_TEST_INTEGRATION_MULTI_CLIENT_STATUS_CHANGE_CHECKER_H_