Close notification windows while message loop is still active

ash/shell.h

Index: ash/shell.h
diff --git a/ash/shell.h b/ash/shell.h
index 2c0657be4a48ab3b79aaa8e097f893f81c1f7bf3..bc2ef6c462d839f7fb15de0c9370c05724ec8529 100644
--- a/ash/shell.h
+++ b/ash/shell.h
@@ -130,6 +130,10 @@ class ASH_EXPORT Shell {
   aura::Window* GetContainer(int container_id);
   const aura::Window* GetContainer(int container_id) const;
 
+  // Close all ash windows, such as launcher, status area and background,
+  // and remove all event filters.
+  void Shutdown();
+
   // Adds or removes |filter| from the RootWindowEventFilter.
   void AddRootWindowEventFilter(aura::EventFilter* filter);
   void RemoveRootWindowEventFilter(aura::EventFilter* filter);
@@ -343,6 +347,9 @@ class ASH_EXPORT Shell {
   // |status_widget_|).
   scoped_ptr<SystemTray> tray_;
 
+  // If the shell has been shutdown.

[Ben Goodger (Google), 2012/04/10 22:35:02]

shut down

+  bool shutdown_;
+
   DISALLOW_COPY_AND_ASSIGN(Shell);
 };