Standardize usage of virtual/override/final specifiers.

ui/wm/core/default_activation_client.h

 // 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.
 
 #ifndef UI_WM_CORE_DEFAULT_ACTIVATION_CLIENT_H_
 #define UI_WM_CORE_DEFAULT_ACTIVATION_CLIENT_H_
 
 #include <vector>
 
 #include "base/compiler_specific.h"
@@ skipping 14 matching lines @@
 // Simple ActivationClient implementation for use by tests and other targets
 // that just need basic behavior (e.g. activate windows whenever requested,
 // restack windows at the top when they're activated, etc.). This object deletes
 // itself when the root window it is associated with is destroyed.
 class WM_EXPORT DefaultActivationClient : public aura::client::ActivationClient,
                                           public aura::WindowObserver {
  public:
   explicit DefaultActivationClient(aura::Window* root_window);
 
   // Overridden from aura::client::ActivationClient:
-  virtual void AddObserver(
+  void AddObserver(aura::client::ActivationChangeObserver* observer) override;
+  void RemoveObserver(
       aura::client::ActivationChangeObserver* observer) override;
-  virtual void RemoveObserver(
-      aura::client::ActivationChangeObserver* observer) override;
-  virtual void ActivateWindow(aura::Window* window) override;
-  virtual void DeactivateWindow(aura::Window* window) override;
-  virtual aura::Window* GetActiveWindow() override;
-  virtual aura::Window* GetActivatableWindow(aura::Window* window) override;
-  virtual aura::Window* GetToplevelWindow(aura::Window* window) override;
-  virtual bool CanActivateWindow(aura::Window* window) const override;
+  void ActivateWindow(aura::Window* window) override;
+  void DeactivateWindow(aura::Window* window) override;
+  aura::Window* GetActiveWindow() override;
+  aura::Window* GetActivatableWindow(aura::Window* window) override;
+  aura::Window* GetToplevelWindow(aura::Window* window) override;
+  bool CanActivateWindow(aura::Window* window) const override;
 
   // Overridden from WindowObserver:
-  virtual void OnWindowDestroyed(aura::Window* window) override;
+  void OnWindowDestroyed(aura::Window* window) override;
 
  private:
   class Deleter;
 
-  virtual ~DefaultActivationClient();
+  ~DefaultActivationClient() override;
   void RemoveActiveWindow(aura::Window* window);
 
   // This class explicitly does NOT store the active window in a window property
   // to make sure that ActivationChangeObserver is not treated as part of the
   // aura API. Assumptions to that end will cause tests that use this client to
   // fail.
   std::vector<aura::Window*> active_windows_;
 
   // The window which was active before the currently active one.
   aura::Window* last_active_;
 
   ObserverList<aura::client::ActivationChangeObserver> observers_;
 
   DISALLOW_COPY_AND_ASSIGN(DefaultActivationClient);
 };
 
 }  // namespace wm
 
 #endif  // UI_WM_CORE_DEFAULT_ACTIVATION_CLIENT_H_