Standardize usage of virtual/override/final specifiers.

ui/views/widget/window_reorderer.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 "ui/views/widget/window_reorderer.h"
 
 #include <map>
 #include <vector>
 
 #include "ui/aura/window.h"
@@ skipping 43 matching lines @@
     GetOrderOfViewsWithLayers(view->child_at(i), parent_layer, hosts, order);
 }
 
 }  // namespace
 
 // Class which reorders windows as a result of the kHostViewKey property being
 // set on the window.
 class WindowReorderer::AssociationObserver : public aura::WindowObserver {
  public:
   explicit AssociationObserver(WindowReorderer* reorderer);
-  virtual ~AssociationObserver();
+  ~AssociationObserver() override;
 
   // Start/stop observing changes in the kHostViewKey property on |window|.
   void StartObserving(aura::Window* window);
   void StopObserving(aura::Window* window);
 
  private:
   // aura::WindowObserver overrides:
-  virtual void OnWindowPropertyChanged(aura::Window* window,
-                                      const void* key,
-                                      intptr_t old) override;
-  virtual void OnWindowDestroying(aura::Window* window) override;
+  void OnWindowPropertyChanged(aura::Window* window,
+                               const void* key,
+                               intptr_t old) override;
+  void OnWindowDestroying(aura::Window* window) override;
 
   // Not owned.
   WindowReorderer* reorderer_;
 
   std::set<aura::Window*> windows_;
 
   DISALLOW_COPY_AND_ASSIGN(AssociationObserver);
 };
 
 WindowReorderer::AssociationObserver::AssociationObserver(
@@ skipping 106 matching lines @@
   association_observer_->StopObserving(window);
 }
 
 void WindowReorderer::OnWindowDestroying(aura::Window* window) {
   parent_window_->RemoveObserver(this);
   parent_window_ = NULL;
   association_observer_.reset();
 }
 
 }  // namespace views