Fix the content_browsertests everywhere maybe.

chrome/browser/ui/views/javascript_app_modal_dialog_views.cc

 // 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.
 
 #include "chrome/browser/ui/views/javascript_app_modal_dialog_views.h"
 
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/ui/app_modal_dialogs/javascript_app_modal_dialog.h"
 #include "grit/generated_resources.h"
 #include "ui/base/keycodes/keyboard_codes.h"
@@ skipping 144 matching lines @@
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // NativeAppModalDialog, public:
 
 // static
 NativeAppModalDialog* NativeAppModalDialog::CreateNativeJavaScriptPrompt(
     JavaScriptAppModalDialog* dialog,
     gfx::NativeWindow parent_window) {
   JavaScriptAppModalDialogViews* d = new JavaScriptAppModalDialogViews(dialog);
-  views::Widget::CreateWindowWithParent(d, parent_window);
+  if (parent_window)
+    views::Widget::CreateWindowWithParent(d, parent_window);
+  else
+    views::Widget::CreateWindow(d);
   return d;
 }