Standardize usage of virtual/override/final specifiers.

ui/views/controls/scrollbar/kennedy_scroll_bar.cc

 // Copyright (c) 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 "ui/views/controls/scrollbar/kennedy_scroll_bar.h"
 
 #include "third_party/skia/include/core/SkColor.h"
 #include "third_party/skia/include/core/SkXfermode.h"
 #include "ui/gfx/canvas.h"
 #include "ui/views/background.h"
 #include "ui/views/border.h"
 #include "ui/views/controls/scrollbar/base_scroll_bar_thumb.h"
 
 namespace views {
 namespace {
 
 const int kScrollbarWidth = 10;
 const int kThumbMinimumSize = kScrollbarWidth * 2;
 const SkColor kBorderColor = SkColorSetARGB(32, 0, 0, 0);
 const SkColor kThumbHoverColor = SkColorSetARGB(128, 0, 0, 0);
 const SkColor kThumbDefaultColor = SkColorSetARGB(64, 0, 0, 0);
 const SkColor kTrackHoverColor = SkColorSetARGB(32, 0, 0, 0);
 
 class KennedyScrollBarThumb : public BaseScrollBarThumb {
  public:
   explicit KennedyScrollBarThumb(BaseScrollBar* scroll_bar);
-  virtual ~KennedyScrollBarThumb();
+  ~KennedyScrollBarThumb() override;
 
  protected:
   // View overrides:
-  virtual gfx::Size GetPreferredSize() const override;
-  virtual void OnPaint(gfx::Canvas* canvas) override;
+  gfx::Size GetPreferredSize() const override;
+  void OnPaint(gfx::Canvas* canvas) override;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(KennedyScrollBarThumb);
 };
 
 KennedyScrollBarThumb::KennedyScrollBarThumb(BaseScrollBar* scroll_bar)
     : BaseScrollBarThumb(scroll_bar) {
 }
 
 KennedyScrollBarThumb::~KennedyScrollBarThumb() {
@@ skipping 55 matching lines @@
   CustomButton::ButtonState state = GetThumbTrackState();
   if ((state == CustomButton::STATE_HOVERED) ||
       (state == CustomButton::STATE_PRESSED)) {
     gfx::Rect local_bounds(GetLocalBounds());
     canvas->FillRect(local_bounds, kTrackHoverColor);
     canvas->DrawRect(local_bounds, kBorderColor);
   }
 }
 
 }  // namespace views