Standardize usage of virtual/override/final specifiers.

chrome/browser/ui/views/detachable_toolbar_view.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_UI_VIEWS_DETACHABLE_TOOLBAR_VIEW_H_
 #define CHROME_BROWSER_UI_VIEWS_DETACHABLE_TOOLBAR_VIEW_H_
 
 #include "chrome/browser/ui/host_desktop.h"
 #include "ui/views/accessible_pane_view.h"
 
 struct SkRect;
 
 // DetachableToolbarView contains functionality common to views that can detach
 // from the Chrome frame, such as the BookmarkBarView and the Extension shelf.
 class DetachableToolbarView : public views::AccessiblePaneView {
  public:
   // The color gradient start value close to the edge of the divider.
   static const SkColor kEdgeDividerColor;
   // The color gradient value for the middle of the divider.
   static const SkColor kMiddleDividerColor;
 
   DetachableToolbarView() {}
-  virtual ~DetachableToolbarView() {}
+  ~DetachableToolbarView() override {}
 
   // Whether the view is currently detached from the Chrome frame.
   virtual bool IsDetached() const = 0;
 
   // Gets the current state of the resize animation (show/hide).
   virtual double GetAnimationValue() const = 0;
 
   // Gets the current amount of overlap atop the browser toolbar.
   virtual int GetToolbarOverlap() const = 0;
 
@@ skipping 53 matching lines @@
                                    int vertical_padding,
                                    SkColor top_color,
                                    SkColor middle_color,
                                    SkColor bottom_color);
 
  private:
   DISALLOW_COPY_AND_ASSIGN(DetachableToolbarView);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_DETACHABLE_TOOLBAR_VIEW_H_