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

chrome/browser/extensions/api/braille_display_private/braille_controller_stub.cc

 // 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.
 
 #include "chrome/browser/extensions/api/braille_display_private/braille_controller.h"
 
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/singleton.h"
 #include "chrome/common/extensions/api/braille_display_private.h"
 
 namespace extensions {
 namespace api {
 namespace braille_display_private {
 
 // Stub implementation of BrailleController for use when brlapi is not
 // enabled.
 class BrailleControllerImpl : public BrailleController {
  public:
   static BrailleControllerImpl* GetInstance();
-  virtual scoped_ptr<DisplayState> GetDisplayState() override;
-  virtual void WriteDots(const std::string& cells) override;
-  virtual void AddObserver(BrailleObserver* observer) override;
-  virtual void RemoveObserver(BrailleObserver* observer) override;
+  scoped_ptr<DisplayState> GetDisplayState() override;
+  void WriteDots(const std::string& cells) override;
+  void AddObserver(BrailleObserver* observer) override;
+  void RemoveObserver(BrailleObserver* observer) override;
 
  private:
   BrailleControllerImpl();
-  virtual ~BrailleControllerImpl();
+  ~BrailleControllerImpl() override;
   friend struct DefaultSingletonTraits<BrailleControllerImpl>;
   DISALLOW_COPY_AND_ASSIGN(BrailleControllerImpl);
 };
 
 BrailleController::BrailleController() {
 }
 
 BrailleController::~BrailleController() {
 }
 
@@ skipping 23 matching lines @@
 
 void BrailleControllerImpl::AddObserver(BrailleObserver* observer) {
 }
 
 void BrailleControllerImpl::RemoveObserver(BrailleObserver* observer) {
 }
 
 }  // namespace braille_display_private
 }  // namespace api
 }  // namespace extensions