Fixes crash in closing menus. There are two issues here:

ui/views/widget/widget.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_WIDGET_H_
 #define UI_VIEWS_WIDGET_WIDGET_H_
 #pragma once
 
 #include <set>
 #include <stack>
@@ skipping 588 matching lines @@
 
   // True if the widget is considered top level widget. Top level widget
   // is a widget of TYPE_WINDOW, TYPE_PANEL, TYPE_WINDOW_FRAMELESS, BUBBLE,
   // POPUP or MENU, and has a focus manager and input method object associated
   // with it. TYPE_CONTROL and TYPE_TOOLTIP is not considered top level.
   bool is_top_level() const { return is_top_level_; }
 
   // Returns the bounds of work area in the screen that Widget belongs to.
   gfx::Rect GetWorkAreaBoundsInScreen() const;
 
+  // Notification that our owned parent is closing.
+  virtual void OnOwnedParentClosing();

[Ben Goodger (Google), 2012/04/26 02:34:54]

owning parent?

or how about

OnOwnerClosing()?

+
   // Overridden from NativeWidgetDelegate:
   virtual bool IsModal() const OVERRIDE;
   virtual bool IsDialogBox() const OVERRIDE;
   virtual bool CanActivate() const OVERRIDE;
   virtual bool IsInactiveRenderingDisabled() const OVERRIDE;
   virtual void EnableInactiveRendering() OVERRIDE;
   virtual void OnNativeWidgetActivationChanged(bool active) OVERRIDE;
   virtual void OnNativeFocus(gfx::NativeView focused_view) OVERRIDE;
   virtual void OnNativeBlur(gfx::NativeView focused_view) OVERRIDE;
   virtual void OnNativeWidgetVisibilityChanged(bool visible) OVERRIDE;
@@ skipping 155 matching lines @@
   // duplicate move events even though the mouse hasn't moved.
   bool last_mouse_event_was_move_;
   gfx::Point last_mouse_event_position_;
 
   DISALLOW_COPY_AND_ASSIGN(Widget);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_WIDGET_WIDGET_H_