Make infobars ignore button clicks when closing.

chrome/browser/ui/views/infobars/extension_infobar.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/views/infobars/extension_infobar.h"
 
 #include "chrome/browser/extensions/extension_context_menu_model.h"
 #include "chrome/browser/extensions/extension_host.h"
 #include "chrome/browser/extensions/extension_infobar_delegate.h"
 #include "chrome/browser/platform_util.h"
@@ skipping 119 matching lines @@
   menu_->SetVisible(true);
 
   Layout();
 }
 
 void ExtensionInfoBar::OnDelegateDeleted() {
   delegate_ = NULL;
 }
 
 void ExtensionInfoBar::RunMenu(View* source, const gfx::Point& pt) {
+  if (!owned())
+    return;  // We're closing; don't call anything, it might access the owner.
   const Extension* extension = GetDelegate()->extension_host()->extension();
   if (!extension->ShowConfigureContextMenus())
     return;
 
   Browser* browser = BrowserView::GetBrowserViewForNativeWindow(
       platform_util::GetTopLevel(source->GetWidget()->GetNativeView()))->
       browser();
   scoped_refptr<ExtensionContextMenuModel> options_menu_contents =
       new ExtensionContextMenuModel(extension, browser, NULL);
   DCHECK_EQ(source, menu_);
   RunMenuAt(options_menu_contents.get(), menu_, views::MenuItemView::TOPLEFT);
-  // TODO(pkasting): this may be deleted after rewrite.
 }
 
 ExtensionInfoBarDelegate* ExtensionInfoBar::GetDelegate() {
   return delegate_ ? delegate_->AsExtensionInfoBarDelegate() : NULL;
 }