Standardize usage of virtual/override/final specifiers.

ash/wm/overview/transparent_activate_window_button.cc

 // 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.
 
 #include "ash/wm/overview/transparent_activate_window_button.h"
 
 #include "ash/shell.h"
 #include "ash/shell_window_ids.h"
 #include "ash/wm/window_state.h"
 #include "ui/views/controls/button/custom_button.h"
 #include "ui/views/widget/widget.h"
 
 namespace ash {
 
 namespace {
 const char kTransparentButtonName[] = "TransparentButton";
 
 // Transparent button that handles events which activate windows in overview
 // mode.
 class TransparentButton : public views::CustomButton {
  public:
   explicit TransparentButton(views::ButtonListener* listener)
       : CustomButton(listener) {
   }
-  virtual ~TransparentButton() {}
+  ~TransparentButton() override {}
 
   // views::CustomButton:
   void OnGestureEvent(ui::GestureEvent* event) override {
     // TODO(tdanderson): Re-evaluate whether we want to set capture once
     //                   the a fix has landed to avoid crashing when a window
     //                   having an active gesture sequence is destroyed as a
     //                   result of a gesture in a separate window.
     if (event->type() == ui::ET_GESTURE_TAP_DOWN)
       GetWidget()->SetCapture(this);
 
     if (event->type() == ui::ET_GESTURE_TAP ||
         event->type() == ui::ET_GESTURE_END) {
       GetWidget()->ReleaseCapture();
     }
 
     CustomButton::OnGestureEvent(event);
     event->StopPropagation();
   }
 
-  virtual const char* GetClassName() const override {
-    return kTransparentButtonName;
-  }
+  const char* GetClassName() const override { return kTransparentButtonName; }
 
  private:
   DISALLOW_COPY_AND_ASSIGN(TransparentButton);
 };
 
 // Initializes the event handler transparent window.
 views::Widget* InitEventHandler(aura::Window* root_window) {
   views::Widget* widget = new views::Widget;
   views::Widget::InitParams params;
   params.type = views::Widget::InitParams::TYPE_POPUP;
@@ skipping 34 matching lines @@
 
 TransparentActivateWindowButton::~TransparentActivateWindowButton() {
 }
 
 void TransparentActivateWindowButton::ButtonPressed(views::Button* sender,
                                                     const ui::Event& event) {
   wm::GetWindowState(activate_window_)->Activate();
 }
 
 }  // namespace ash