Enable <adview> tag for packaged apps.

chrome/renderer/resources/extensions/ad_view_deny.js

+// Copyright (c) 2013 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.
+
+var watchForTag = require("tagWatcher").watchForTag;
+
+// Output error message to console when using <adview> tag with no permission.
+var errorMessage = "You do not have permission to use <adview> tag." +
+  " Be sure to declare 'adview' permission in your manifest.";
+
+window.addEventListener('DOMContentLoaded', function() {
+  watchForTag('ADVIEW', function() {  console.error(errorMessage); });
+});