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

chrome/browser/search_engines/search_provider_install_state_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_SEARCH_ENGINES_SEARCH_PROVIDER_INSTALL_STATE_MESSAGE_FILTER_H_
 #define CHROME_BROWSER_SEARCH_ENGINES_SEARCH_PROVIDER_INSTALL_STATE_MESSAGE_FILTER_H_
 
 #include "base/memory/weak_ptr.h"
 #include "chrome/browser/search_engines/search_provider_install_data.h"
 #include "chrome/common/search_provider.h"
 #include "content/public/browser/browser_message_filter.h"
 
 class GURL;
 class Profile;
 
 // Handles messages regarding search provider install state on the I/O thread.
 class SearchProviderInstallStateMessageFilter
     : public content::BrowserMessageFilter {
  public:
   // Unlike the other methods, the constructor must be called on the UI thread.
   SearchProviderInstallStateMessageFilter(int render_process_id,
                                           Profile* profile);
 
   // content::BrowserMessageFilter implementation.
-  virtual bool OnMessageReceived(const IPC::Message& message) override;
+  bool OnMessageReceived(const IPC::Message& message) override;
 
  private:
-  virtual ~SearchProviderInstallStateMessageFilter();
+  ~SearchProviderInstallStateMessageFilter() override;
 
   // Figures out the install state for the search provider.
    search_provider::InstallState GetSearchProviderInstallState(
       const GURL& page_location,
       const GURL& requested_host);
 
   // Starts handling the message requesting the search provider install state.
   void OnGetSearchProviderInstallState(const GURL& page_location,
                                        const GURL& requested_host,
                                        IPC::Message* reply_msg);
@@ skipping 10 matching lines @@
   // thread.
   const bool is_off_the_record_;
 
   // Used to schedule invocations of ReplyWithProviderInstallState.
   base::WeakPtrFactory<SearchProviderInstallStateMessageFilter> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(SearchProviderInstallStateMessageFilter);
 };
 
 #endif  // CHROME_BROWSER_SEARCH_ENGINES_SEARCH_PROVIDER_INSTALL_STATE_MESSAGE_FILTER_H_