Standardize usage of virtual/override/final specifiers.

ash/touch/touch_hud_debug.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 "ash/touch/touch_hud_debug.h"
 
 #include "ash/display/display_manager.h"
 #include "ash/root_window_controller.h"
 #include "ash/shell.h"
 #include "base/json/json_string_value_serializer.h"
@@ skipping 239 matching lines @@
  public:
   explicit TouchHudCanvas(const TouchLog& touch_log)
       : touch_log_(touch_log),
         scale_(1) {
     SetPaintToLayer(true);
     SetFillsBoundsOpaquely(false);
 
     paint_.setStyle(SkPaint::kFill_Style);
   }
 
-  virtual ~TouchHudCanvas() {}
+  ~TouchHudCanvas() override {}
 
   void SetScale(int scale) {
     if (scale_ == scale)
       return;
     scale_ = scale;
     gfx::Transform transform;
     transform.Scale(1. / scale_, 1. / scale_);
     layer()->SetTransform(transform);
   }
 
@@ skipping 30 matching lines @@
     SkScalar y = SkIntToScalar(location.y());
     SkPoint last;
     if (!paths_[trace_index].getLastPt(&last) || x != last.x() ||
         y != last.y()) {
       paths_[trace_index].addCircle(x, y, SkIntToScalar(kPointRadius));
       SchedulePaint();
     }
   }
 
   // Overridden from views::View.
-  virtual void OnPaint(gfx::Canvas* canvas) override {
+  void OnPaint(gfx::Canvas* canvas) override {
     for (int i = 0; i < kMaxPaths; ++i) {
       if (paths_[i].countPoints() == 0)
         continue;
       paint_.setColor(colors_[i]);
       canvas->DrawPath(paths_[i], paint_);
     }
   }
 
   SkPaint paint_;
 
@@ skipping 157 matching lines @@
     RootWindowController* controller) {
   controller->set_touch_hud_debug(this);
 }
 
 void TouchHudDebug::UnsetHudForRootWindowController(
     RootWindowController* controller) {
   controller->set_touch_hud_debug(NULL);
 }
 
 }  // namespace ash