Standardize usage of virtual/override/final specifiers.

ui/views/controls/button/button.h

 // Copyright (c) 2011 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 UI_VIEWS_CONTROLS_BUTTON_BUTTON_H_
 #define UI_VIEWS_CONTROLS_BUTTON_BUTTON_H_
 
 #include "ui/native_theme/native_theme.h"
 #include "ui/views/view.h"
 
 namespace views {
 
 class Button;
 class Event;
 
 // An interface implemented by an object to let it know that a button was
 // pressed.
 class VIEWS_EXPORT ButtonListener {
  public:
   virtual void ButtonPressed(Button* sender, const ui::Event& event) = 0;
 
  protected:
   virtual ~ButtonListener() {}
 };
 
 // A View representing a button. Depending on the specific type, the button
 // could be implemented by a native control or custom rendered.
 class VIEWS_EXPORT Button : public View {
  public:
-  virtual ~Button();
+  ~Button() override;
 
   // Button states for various button sub-types.
   enum ButtonState {
     STATE_NORMAL = 0,
     STATE_HOVERED,
     STATE_PRESSED,
     STATE_DISABLED,
     STATE_COUNT,
   };
 
   // Button styles with associated images and border painters.
   // TODO(msw): Add Menu, ComboBox, etc.
   enum ButtonStyle {
     STYLE_BUTTON = 0,
     STYLE_TEXTBUTTON,
     STYLE_COUNT,
   };
 
   static ButtonState GetButtonStateFrom(ui::NativeTheme::State state);
 
   void SetTooltipText(const base::string16& tooltip_text);
 
   int tag() const { return tag_; }
   void set_tag(int tag) { tag_ = tag; }
 
   void SetAccessibleName(const base::string16& name);
 
   // Overridden from View:
-  virtual bool GetTooltipText(const gfx::Point& p,
-                              base::string16* tooltip) const override;
-  virtual void GetAccessibleState(ui::AXViewState* state) override;
+  bool GetTooltipText(const gfx::Point& p,
+                      base::string16* tooltip) const override;
+  void GetAccessibleState(ui::AXViewState* state) override;
 
  protected:
   // Construct the Button with a Listener. The listener can be NULL. This can be
   // true of buttons that don't have a listener - e.g. menubuttons where there's
   // no default action and checkboxes.
   explicit Button(ButtonListener* listener);
 
   // Cause the button to notify the listener that a click occurred.
   virtual void NotifyClick(const ui::Event& event);
 
@@ skipping 10 matching lines @@
   // The id tag associated with this button. Used to disambiguate buttons in
   // the ButtonListener implementation.
   int tag_;
 
   DISALLOW_COPY_AND_ASSIGN(Button);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_CONTROLS_BUTTON_BUTTON_H_