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

chrome/browser/sync/sync_policy_handler.h

 // Copyright 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_SYNC_SYNC_POLICY_HANDLER_H_
 #define CHROME_BROWSER_SYNC_SYNC_POLICY_HANDLER_H_
 
 #include "base/compiler_specific.h"
 #include "components/policy/core/browser/configuration_policy_handler.h"
 
 class PrefValueMap;
 
 namespace browser_sync {
 
 class PolicyMap;
 
 // ConfigurationPolicyHandler for the SyncDisabled policy.
 class SyncPolicyHandler : public policy::TypeCheckingPolicyHandler {
  public:
   SyncPolicyHandler();
-  virtual ~SyncPolicyHandler();
+  ~SyncPolicyHandler() override;
 
   // ConfigurationPolicyHandler methods:
-  virtual void ApplyPolicySettings(const policy::PolicyMap& policies,
-                                   PrefValueMap* prefs) override;
+  void ApplyPolicySettings(const policy::PolicyMap& policies,
+                           PrefValueMap* prefs) override;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(SyncPolicyHandler);
 };
 
 }  // namespace browser_sync
 
 #endif  // CHROME_BROWSER_SYNC_SYNC_POLICY_HANDLER_H_