chromeos: converts ash devtools to aura::Window

ui/wm/core/focus_controller.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_WM_CORE_FOCUS_CONTROLLER_H_
 #define UI_WM_CORE_FOCUS_CONTROLLER_H_
 
 #include <memory>
 
 #include "base/compiler_specific.h"
@@ skipping 37 matching lines @@
   // |rules| cannot be NULL.
   explicit FocusController(FocusRules* rules);
   ~FocusController() override;
 
   // Overridden from aura::client::ActivationClient:
   void AddObserver(aura::client::ActivationChangeObserver* observer) override;
   void RemoveObserver(
       aura::client::ActivationChangeObserver* observer) override;
   void ActivateWindow(aura::Window* window) override;
   void DeactivateWindow(aura::Window* window) override;
-  aura::Window* GetActiveWindow() override;
+  const aura::Window* GetActiveWindow() const override;
   aura::Window* GetActivatableWindow(aura::Window* window) override;
   aura::Window* GetToplevelWindow(aura::Window* window) override;
   bool CanActivateWindow(aura::Window* window) const override;
 
   // Overridden from aura::client::FocusClient:
   void AddObserver(aura::client::FocusChangeObserver* observer) override;
   void RemoveObserver(aura::client::FocusChangeObserver* observer) override;
   void FocusWindow(aura::Window* window) override;
   void ResetFocusWithinActiveWindow(aura::Window* window) override;
   aura::Window* GetFocusedWindow() override;
@@ skipping 62 matching lines @@
   base::ObserverList<aura::client::FocusChangeObserver> focus_observers_;
 
   ScopedObserver<aura::Window, aura::WindowObserver> observer_manager_;
 
   DISALLOW_COPY_AND_ASSIGN(FocusController);
 };
 
 }  // namespace wm
 
 #endif  // UI_WM_CORE_FOCUS_CONTROLLER_H_