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

chrome/browser/renderer_context_menu/spelling_menu_observer.h

 // Copyright 2014 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_CONTEXT_MENU_SPELLING_MENU_OBSERVER_H_
 #define CHROME_BROWSER_RENDERER_CONTEXT_MENU_SPELLING_MENU_OBSERVER_H_
 
 #include <vector>
 
 #include "base/compiler_specific.h"
@@ skipping 22 matching lines @@
 //
 //   void RenderViewContextMenu::InitMenu() {
 //     spelling_menu_observer_.reset(new SpellingMenuObserver(this));
 //     if (spelling_menu_observer_.get())
 //       observers_.AddObserver(spelling_menu_observer.get());
 //   }
 //
 class SpellingMenuObserver : public RenderViewContextMenuObserver {
  public:
   explicit SpellingMenuObserver(RenderViewContextMenuProxy* proxy);
-  virtual ~SpellingMenuObserver();
+  ~SpellingMenuObserver() override;
 
   // RenderViewContextMenuObserver implementation.
-  virtual void InitMenu(const content::ContextMenuParams& params) override;
-  virtual bool IsCommandIdSupported(int command_id) override;
-  virtual bool IsCommandIdChecked(int command_id) override;
-  virtual bool IsCommandIdEnabled(int command_id) override;
-  virtual void ExecuteCommand(int command_id) override;
-  virtual void OnMenuCancel() override;
+  void InitMenu(const content::ContextMenuParams& params) override;
+  bool IsCommandIdSupported(int command_id) override;
+  bool IsCommandIdChecked(int command_id) override;
+  bool IsCommandIdEnabled(int command_id) override;
+  void ExecuteCommand(int command_id) override;
+  void OnMenuCancel() override;
 
   // A callback function called when the Spelling service finishes checking a
   // misspelled word.
   void OnTextCheckComplete(
       SpellingServiceClient::ServiceType type,
       bool success,
       const base::string16& text,
       const std::vector<SpellCheckResult>& results);
 
  private:
@@ skipping 49 matching lines @@
   // JSON-RPC request to the service and retrieve suggestions.
   BooleanPrefMember integrate_spelling_service_;
 
   // Flag indicating whether automatic spelling correction is enabled.
   BooleanPrefMember autocorrect_spelling_;
 
   DISALLOW_COPY_AND_ASSIGN(SpellingMenuObserver);
 };
 
 #endif  // CHROME_BROWSER_RENDERER_CONTEXT_MENU_SPELLING_MENU_OBSERVER_H_