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

ui/aura/root_window.cc

 // 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.
 
 #include "ui/aura/root_window.h"
 
 #include <vector>
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 314 matching lines @@
        window->ContainsPointInRoot(GetLastMouseLocationInRoot()))) {
     PostMouseMoveEventAfterWindowChange();
   }
 }
 
 void RootWindow::OnKeyboardMappingChanged() {
   FOR_EACH_OBSERVER(RootWindowObserver, observers_,
                     OnKeyboardMappingChanged(this));
 }
 
-void RootWindow::OnRootWindowHostClosed() {
+void RootWindow::OnRootWindowHostCloseRequested() {
   FOR_EACH_OBSERVER(RootWindowObserver, observers_,
-                    OnRootWindowHostClosed(this));
+                    OnRootWindowHostCloseRequested(this));
 }
 
 void RootWindow::AddRootWindowObserver(RootWindowObserver* observer) {
   observers_.AddObserver(observer);
 }
 
 void RootWindow::RemoveRootWindowObserver(RootWindowObserver* observer) {
   observers_.RemoveObserver(observer);
 }
 
@@ skipping 705 matching lines @@
 void RootWindow::UnlockCompositor() {
   DCHECK(compositor_lock_);
   compositor_lock_ = NULL;
   if (draw_on_compositor_unlock_) {
     draw_on_compositor_unlock_ = false;
     ScheduleDraw();
   }
 }
 
 }  // namespace aura