Profiles: Fixed crash when avatar bubble is launched using ctrl+shift+m with only default profile

chrome/browser/ui/gtk/avatar_menu_button_gtk.cc

 // Copyright (c) 2011 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 "chrome/browser/ui/gtk/avatar_menu_button_gtk.h"
 
 #include "base/i18n/rtl.h"
 #include "chrome/browser/profiles/profile_metrics.h"
 #include "chrome/browser/ui/gtk/avatar_menu_bubble_gtk.h"
 #include "chrome/browser/ui/gtk/bubble/bubble_gtk.h"
@@ skipping 31 matching lines @@
                                               GdkEventButton* event) {
   if (event->button != 1)
     return FALSE;
 
   ShowAvatarBubble();
   ProfileMetrics::LogProfileOpenMethod(ProfileMetrics::ICON_AVATAR_BUBBLE);
   return TRUE;
 }
 
 void AvatarMenuButtonGtk::ShowAvatarBubble() {
-  new AvatarMenuBubbleGtk(browser_, widget_.get(), arrow_location_, NULL);
+  // Only show the avatar bubble if the avatar button is in the title bar.
+  if (gtk_widget_get_parent_window(widget_.get()))
+    new AvatarMenuBubbleGtk(browser_, widget_.get(), arrow_location_, NULL);
 }