Make infobars ignore button clicks when closing.

chrome/browser/ui/gtk/infobars/extension_infobar_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/infobars/extension_infobar_gtk.h"
 
 #include "chrome/browser/extensions/extension_context_menu_model.h"
 #include "chrome/browser/extensions/extension_host.h"
 #include "chrome/browser/platform_util.h"
 #include "chrome/browser/ui/gtk/browser_window_gtk.h"
@@ skipping 159 matching lines @@
 void ExtensionInfoBarGtk::OnSizeAllocate(GtkWidget* widget,
                                          GtkAllocation* allocation) {
   gfx::Size new_size(allocation->width, allocation->height);
 
   delegate_->extension_host()->view()->render_view_host()->view()
       ->SetSize(new_size);
 }
 
 gboolean ExtensionInfoBarGtk::OnButtonPress(GtkWidget* widget,
                                             GdkEventButton* event) {
+  // If we're closing, don't call anything, it might access the owner.
+  if (!owned())
+    return FALSE;
+
   if (event->button != 1)
     return FALSE;
 
   MenuGtk* menu = BuildMenu();
   if (!menu)
     return FALSE;
 
   gtk_chrome_button_set_paint_state(GTK_CHROME_BUTTON(widget),
                                     GTK_STATE_ACTIVE);
   menu->PopupForWidget(widget, event->button, event->time);
 
   return TRUE;
 }
 
 gboolean ExtensionInfoBarGtk::OnExpose(GtkWidget* sender,
                                        GdkEventExpose* event) {
   // We also need to draw our infobar arrows over the renderer.
   static_cast<InfoBarContainerGtk*>(container())->
       PaintInfobarBitsOn(sender, event, this);
 
   return FALSE;
 }
 
 InfoBar* ExtensionInfoBarDelegate::CreateInfoBar(TabContentsWrapper* owner) {
   return new ExtensionInfoBarGtk(owner, this);
 }