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

chrome/browser/renderer_host/chrome_render_message_filter.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_RENDERER_HOST_CHROME_RENDER_MESSAGE_FILTER_H_
 #define CHROME_BROWSER_RENDERER_HOST_CHROME_RENDER_MESSAGE_FILTER_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 27 matching lines @@
         : v8_memory_allocated_(v8_memory_allocated),
           v8_memory_used_(v8_memory_used) {}
     size_t v8_memory_allocated() const { return v8_memory_allocated_; }
     size_t v8_memory_used() const { return v8_memory_used_; }
    private:
     size_t v8_memory_allocated_;
     size_t v8_memory_used_;
   };
 
   // content::BrowserMessageFilter methods:
-  virtual bool OnMessageReceived(const IPC::Message& message) override;
-  virtual void OverrideThreadForMessage(
-      const IPC::Message& message,
-      content::BrowserThread::ID* thread) override;
+  bool OnMessageReceived(const IPC::Message& message) override;
+  void OverrideThreadForMessage(const IPC::Message& message,
+                                content::BrowserThread::ID* thread) override;
 
  private:
   friend class content::BrowserThread;
   friend class base::DeleteHelper<ChromeRenderMessageFilter>;
 
-  virtual ~ChromeRenderMessageFilter();
+  ~ChromeRenderMessageFilter() override;
 
   void OnDnsPrefetch(const std::vector<std::string>& hostnames);
   void OnPreconnect(const GURL& url);
   void OnResourceTypeStats(const blink::WebCache::ResourceTypeStats& stats);
   void OnUpdatedCacheStats(const blink::WebCache::UsageStats& stats);
   void OnV8HeapStats(int v8_memory_allocated, int v8_memory_used);
 
   void OnAllowDatabase(int render_frame_id,
                        const GURL& origin_url,
                        const GURL& top_origin_url,
@@ skipping 60 matching lines @@
   // used on the IO thread.
   chrome_browser_net::Predictor* predictor_;
 
   // Used to look up permissions at database creation time.
   scoped_refptr<CookieSettings> cookie_settings_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromeRenderMessageFilter);
 };
 
 #endif  // CHROME_BROWSER_RENDERER_HOST_CHROME_RENDER_MESSAGE_FILTER_H_