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

chrome/renderer/searchbox/search_bouncer.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_RENDERER_SEARCHBOX_SEARCH_BOUNCER_H_
 #define CHROME_RENDERER_SEARCHBOX_SEARCH_BOUNCER_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/gtest_prod_util.h"
 #include "content/public/renderer/render_process_observer.h"
 #include "url/gurl.h"
 
 namespace IPC {
 class Message;
 }
 
 // SearchBouncer tracks a set of URLs which should be transferred back to the
 // browser process for potential reassignment to an Instant renderer process.
 class SearchBouncer : public content::RenderProcessObserver {
  public:
   SearchBouncer();
-  virtual ~SearchBouncer();
+  ~SearchBouncer() override;
 
   // Returns whether a navigation to |url| should bounce back to the browser as
   // a potential Instant url. See chrome::ShouldAssignURLToInstantRenderer().
   bool ShouldFork(const GURL& url) const;
 
   // Returns whether |url| is a valid Instant new tab page URL.
   bool IsNewTabPage(const GURL& url) const;
 
   // Exposed for testing.
   void OnSetSearchURLs(std::vector<GURL> search_urls, GURL new_tab_page_url);
 
  private:
   FRIEND_TEST_ALL_PREFIXES(SearchBouncerTest, SetSearchURLs);
 
   // From RenderProcessObserver:
-  virtual bool OnControlMessageReceived(const IPC::Message& message) override;
+  bool OnControlMessageReceived(const IPC::Message& message) override;
 
   // URLs to bounce back to the browser.
   std::vector<GURL> search_urls_;
   GURL new_tab_page_url_;
 
   DISALLOW_COPY_AND_ASSIGN(SearchBouncer);
 };
 
 #endif  // CHROME_RENDERER_SEARCHBOX_SEARCH_BOUNCER_H_