Fixes crash in ~WidgetGtk. This was caused by your change to no longer...

views/widget/widget_gtk.h

 // Copyright (c) 2009 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 VIEWS_WIDGET_WIDGET_GTK_H_
 #define VIEWS_WIDGET_WIDGET_GTK_H_
 
 #include <gtk/gtk.h>
 
 #include "base/message_loop.h"
@@ skipping 191 matching lines @@
   // window_contents_ is a GtkFixed. If we're not a window/popup, then widget_
   // and window_contents_ point to the same GtkFixed.
   GtkWidget* widget_;
   GtkWidget* window_contents_;
 
   // Child GtkWidgets created with no parent need to be parented to a valid top
   // level window otherwise Gtk throws a fit. |null_parent_| is an invisible
   // popup that such GtkWidgets are parented to.
   static GtkWidget* null_parent_;
 
+  // The TooltipManager.
+  // WARNING: RootView's destructor calls into the TooltipManager. As such, this
+  // must be destroyed AFTER root_view_.
+  scoped_ptr<TooltipManagerGtk> tooltip_manager_;
+
   // The root of the View hierarchy attached to this window.
   scoped_ptr<RootView> root_view_;
 
-  scoped_ptr<TooltipManagerGtk> tooltip_manager_;
-
   // If true, the mouse is currently down.
   bool is_mouse_down_;
 
   // Have we done a mouse grab?
   bool has_capture_;
 
   // The following are used to detect duplicate mouse move events and not
   // deliver them. Displaying a window may result in the system generating
   // duplicate move events even though the mouse hasn't moved.
 
@@ skipping 14 matching lines @@
   bool transparent_;
 
   scoped_ptr<DefaultThemeProvider> default_theme_provider_;
 
   DISALLOW_COPY_AND_ASSIGN(WidgetGtk);
 };
 
 }  // namespace views
 
 #endif  // VIEWS_WIDGET_WIDGET_GTK_H_