Standardize usage of virtual/override/final specifiers.

ui/views/linux_ui/window_button_order_provider.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/window/window_button_order_provider.h"
 
 #include "ui/views/linux_ui/linux_ui.h"
 #include "ui/views/linux_ui/window_button_order_observer.h"
 
 namespace views {
 
 namespace {
 
 class WindowButtonOrderObserverDelegate : public WindowButtonOrderProvider,
                                           public WindowButtonOrderObserver {
  public:
   WindowButtonOrderObserverDelegate();
-  virtual ~WindowButtonOrderObserverDelegate();
+  ~WindowButtonOrderObserverDelegate() override;
 
   // WindowButtonOrderObserver:
-  virtual void OnWindowButtonOrderingChange(
+  void OnWindowButtonOrderingChange(
       const std::vector<views::FrameButton>& leading_buttons,
       const std::vector<views::FrameButton>& trailing_buttons) override;
+
  private:
   DISALLOW_COPY_AND_ASSIGN(WindowButtonOrderObserverDelegate);
 };
 
 ///////////////////////////////////////////////////////////////////////////////
 // WindowButtonOrderObserverDelegate, public:
 
 WindowButtonOrderObserverDelegate::WindowButtonOrderObserverDelegate() {
   views::LinuxUI* ui = views::LinuxUI::instance();
   if (ui)
@@ skipping 40 matching lines @@
 }
 
 void WindowButtonOrderProvider::SetWindowButtonOrder(
     const std::vector<views::FrameButton>& leading_buttons,
     const std::vector<views::FrameButton>& trailing_buttons) {
   leading_buttons_ = leading_buttons;
   trailing_buttons_ = trailing_buttons;
 }
 
 }  // namespace views