Standardize usage of virtual/override/final specifiers.

ash/accelerators/spoken_feedback_toggler.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 ASH_ACCELERATORS_SPOKEN_FEEDBACK_TOGGLER_H_
 #define ASH_ACCELERATORS_SPOKEN_FEEDBACK_TOGGLER_H_
 
 #include "ash/accelerators/key_hold_detector.h"
 #include "ash/ash_export.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 21 matching lines @@
     ~ScopedEnablerForTest() {
       SetEnabled(false);
     }
 
    private:
     DISALLOW_COPY_AND_ASSIGN(ScopedEnablerForTest);
   };
 
  private:
   // KeyHoldDetector overrides:
-  virtual bool ShouldProcessEvent(const ui::KeyEvent* event) const override;
-  virtual bool IsStartEvent(const ui::KeyEvent* event) const override;
-  virtual void OnKeyHold(const ui::KeyEvent* event) override;
-  virtual void OnKeyUnhold(const ui::KeyEvent* event) override;
+  bool ShouldProcessEvent(const ui::KeyEvent* event) const override;
+  bool IsStartEvent(const ui::KeyEvent* event) const override;
+  void OnKeyHold(const ui::KeyEvent* event) override;
+  void OnKeyUnhold(const ui::KeyEvent* event) override;
 
   SpokenFeedbackToggler();
-  virtual ~SpokenFeedbackToggler();
+  ~SpokenFeedbackToggler() override;
 
   bool toggled_;
 
   DISALLOW_COPY_AND_ASSIGN(SpokenFeedbackToggler);
 };
 
 }  // namespace ash
 
 #endif  // ASH_ACCELERATORS_SPOKEN_FEEDBACK_TOGGLER_H_