Standardize usage of virtual/override/final specifiers in ui/.

ui/views/mouse_watcher.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 "ui/views/mouse_watcher.h"
 
 #include "base/bind.h"
 #include "base/compiler_specific.h"
 #include "base/event_types.h"
 #include "base/memory/weak_ptr.h"
@@ skipping 12 matching lines @@
 
 class MouseWatcher::Observer : public ui::EventHandler {
  public:
   explicit Observer(MouseWatcher* mouse_watcher)
       : mouse_watcher_(mouse_watcher),
         event_monitor_(EventMonitor::CreateApplicationMonitor(this)),
         notify_listener_factory_(this) {
   }
 
   // ui::EventHandler implementation:
-  virtual void OnMouseEvent(ui::MouseEvent* event) override {
+  void OnMouseEvent(ui::MouseEvent* event) override {
     switch (event->type()) {
       case ui::ET_MOUSE_MOVED:
       case ui::ET_MOUSE_DRAGGED:
         HandleMouseEvent(MouseWatcherHost::MOUSE_MOVE);
         break;
       case ui::ET_MOUSE_EXITED:
         HandleMouseEvent(MouseWatcherHost::MOUSE_EXIT);
         break;
       case ui::ET_MOUSE_PRESSED:
         HandleMouseEvent(MouseWatcherHost::MOUSE_PRESS);
@@ skipping 71 matching lines @@
 void MouseWatcher::Stop() {
   observer_.reset(NULL);
 }
 
 void MouseWatcher::NotifyListener() {
   observer_.reset(NULL);
   listener_->MouseMovedOutOfHost();
 }
 
 }  // namespace views