Standardize usage of virtual/override/final specifiers.

ui/views/widget/desktop_aura/x11_desktop_handler.h

 // Copyright (c) 2012 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.
 
 #ifndef UI_VIEWS_WIDGET_DESKTOP_AURA_X11_DESKTOP_HANDLER_H_
 #define UI_VIEWS_WIDGET_DESKTOP_AURA_X11_DESKTOP_HANDLER_H_
 
 #include <X11/Xlib.h>
 // Get rid of a macro from Xlib.h that conflicts with Aura's RootWindow class.
 #undef RootWindow
@@ skipping 39 matching lines @@
 
   // Checks if the current active window is |window|.
   bool IsActiveWindow(::Window window) const;
 
   // Processes activation/focus related events. Some of these events are
   // dispatched to the X11 window dispatcher, and not to the X11 root-window
   // dispatcher. The window dispatcher sends these events to here.
   void ProcessXEvent(XEvent* event);
 
   // ui::PlatformEventDispatcher
-  virtual bool CanDispatchEvent(const ui::PlatformEvent& event) override;
-  virtual uint32_t DispatchEvent(const ui::PlatformEvent& event) override;
+  bool CanDispatchEvent(const ui::PlatformEvent& event) override;
+  uint32_t DispatchEvent(const ui::PlatformEvent& event) override;
 
   // Overridden from aura::EnvObserver:
-  virtual void OnWindowInitialized(aura::Window* window) override;
-  virtual void OnWillDestroyEnv() override;
+  void OnWindowInitialized(aura::Window* window) override;
+  void OnWillDestroyEnv() override;
 
  private:
   enum ActiveState {
     ACTIVE,
     NOT_ACTIVE
   };
 
   X11DesktopHandler();
-  virtual ~X11DesktopHandler();
+  ~X11DesktopHandler() override;
 
   // Handles changes in activation.
   void OnActiveWindowChanged(::Window window, ActiveState active_state);
 
   // Called when |window| has been created or destroyed. |window| may not be
   // managed by Chrome.
   void OnWindowCreatedOrDestroyed(int event_type, XID window);
 
   // The display and the native X window hosting the root window.
   XDisplay* xdisplay_;
@@ skipping 15 matching lines @@
   ui::X11AtomCache atom_cache_;
 
   bool wm_supports_active_window_;
 
   DISALLOW_COPY_AND_ASSIGN(X11DesktopHandler);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_WIDGET_DESKTOP_AURA_X11_DESKTOP_HANDLER_H_