linux_aura: Close window when the OS requests it.

ui/views/widget/desktop_aura/desktop_native_widget_aura.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_DESKTOP_NATIVE_WIDGET_AURA_H_
 #define UI_VIEWS_WIDGET_DESKTOP_AURA_DESKTOP_NATIVE_WIDGET_AURA_H_
 
 #include "base/memory/weak_ptr.h"
 #include "ui/aura/client/activation_change_observer.h"
 #include "ui/aura/client/activation_delegate.h"
 #include "ui/aura/client/drag_drop_delegate.h"
 #include "ui/aura/client/focus_change_observer.h"
+#include "ui/aura/root_window_observer.h"
 #include "ui/aura/window_delegate.h"
 #include "ui/views/ime/input_method_delegate.h"
 #include "ui/views/widget/native_widget_private.h"
 
 namespace aura {
 class RootWindow;
 namespace client {
 class StackingClient;
 }
 }
@@ skipping 14 matching lines @@
 class NativeWidgetAuraWindowObserver;
 class TooltipManagerAura;
 
 class VIEWS_EXPORT DesktopNativeWidgetAura
     : public internal::NativeWidgetPrivate,
       public aura::WindowDelegate,
       public aura::client::ActivationDelegate,
       public aura::client::ActivationChangeObserver,
       public aura::client::FocusChangeObserver,
       public views::internal::InputMethodDelegate,
-      public aura::client::DragDropDelegate {
+      public aura::client::DragDropDelegate,
+      public aura::RootWindowObserver {
  public:
   explicit DesktopNativeWidgetAura(internal::NativeWidgetDelegate* delegate);
   virtual ~DesktopNativeWidgetAura();
 
   // Maps from window to DesktopNativeWidgetAura.
   static DesktopNativeWidgetAura* ForWindow(aura::Window* window);
 
   // Called by our DesktopRootWindowHost after it has deleted native resources;
   // this is the signal that we should start our shutdown.
   void OnHostClosed();
@@ skipping 128 matching lines @@
 
   // Overridden from views::internal::InputMethodDelegate:
   virtual void DispatchKeyEventPostIME(const ui::KeyEvent& key) OVERRIDE;
 
   // Overridden from aura::client::DragDropDelegate:
   virtual void OnDragEntered(const ui::DropTargetEvent& event) OVERRIDE;
   virtual int OnDragUpdated(const ui::DropTargetEvent& event) OVERRIDE;
   virtual void OnDragExited() OVERRIDE;
   virtual int OnPerformDrop(const ui::DropTargetEvent& event) OVERRIDE;
 
+  // Overridden from aura::RootWindowObserver:
+  virtual void OnRootWindowHostCloseRequested(
+      const aura::RootWindow* root) OVERRIDE;
+
  private:
   // See class documentation for Widget in widget.h for a note about ownership.
   Widget::InitParams::Ownership ownership_;
 
   // The NativeWidget owns the RootWindow. Required because the RootWindow owns
   // its RootWindowHost, so DesktopRootWindowHost can't own it.
   scoped_ptr<aura::RootWindow> root_window_;
 
   // The following factory is used for calls to close the NativeWidgetAura
   // instance.
@@ skipping 31 matching lines @@
   bool restore_focus_on_activate_;
 
   scoped_ptr<corewm::ShadowController> shadow_controller_;
 
   DISALLOW_COPY_AND_ASSIGN(DesktopNativeWidgetAura);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_WIDGET_DESKTOP_AURA_DESKTOP_NATIVE_WIDGET_AURA_H_