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

chrome/browser/chrome_quota_permission_context.h

 // Copyright (c) 2012 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_CHROME_QUOTA_PERMISSION_CONTEXT_H_
 #define CHROME_BROWSER_CHROME_QUOTA_PERMISSION_CONTEXT_H_
 
 #include "base/compiler_specific.h"
 #include "content/public/browser/quota_permission_context.h"
 #include "storage/common/quota/quota_types.h"
 
 class ChromeQuotaPermissionContext : public content::QuotaPermissionContext {
  public:
   ChromeQuotaPermissionContext();
 
   // The callback will be dispatched on the IO thread.
-  virtual void RequestQuotaPermission(
-      const content::StorageQuotaParams& params,
-      int render_process_id,
-      const PermissionCallback& callback) override;
+  void RequestQuotaPermission(const content::StorageQuotaParams& params,
+                              int render_process_id,
+                              const PermissionCallback& callback) override;
 
   void DispatchCallbackOnIOThread(
       const PermissionCallback& callback,
       QuotaPermissionResponse response);
 
  private:
-  virtual ~ChromeQuotaPermissionContext();
+  ~ChromeQuotaPermissionContext() override;
 };
 
 #endif  // CHROME_BROWSER_CHROME_QUOTA_PERMISSION_CONTEXT_H_