Allow closing root window, or pressing the power button to shutdown ash_shell, and chrome /w chrome…

ui/aura/root_window.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_AURA_ROOT_WINDOW_H_
 #define UI_AURA_ROOT_WINDOW_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
@@ skipping 149 matching lines @@
   // Invoked when |window|'s tranfrom has changed. |contained_mouse|
   // indicates if the bounds before change contained the
   // |last_moust_location()|.
   void OnWindowTransformed(Window* window, bool contained_mouse);
 
   // Invoked when the keyboard mapping (in X11 terms: the mapping between
   // keycodes and keysyms) has changed.
   void OnKeyboardMappingChanged();
 
   // The system windowing system has sent a request that we close our window.
-  void OnRootWindowHostClosed();
+  void OnRootWindowHostCloseRequested();
 
   // Add/remove observer. There is no need to remove the observer if
   // the root window is being deleted. In particular, you SHOULD NOT remove
   // in |WindowObserver::OnWindowDestroying| of the observer observing
   // the root window because it is too late to remove it.
   void AddRootWindowObserver(RootWindowObserver* observer);
   void RemoveRootWindowObserver(RootWindowObserver* observer);
 
   // Posts |native_event| to the platform's event queue.
   void PostNativeEvent(const base::NativeEvent& native_event);
@@ skipping 217 matching lines @@
 
   CompositorLock* compositor_lock_;
   bool draw_on_compositor_unlock_;
 
   DISALLOW_COPY_AND_ASSIGN(RootWindow);
 };
 
 }  // namespace aura
 
 #endif  // UI_AURA_ROOT_WINDOW_H_