Disable DOM MutationEvents for platform apps

chrome/test/data/extensions/platform_apps/mutation_events/main.js

+// 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.
+
+chrome.test.runTests([
+  function noMutationEvents() {
+    var failures = [];
+    function addListener(node) {
+      return function(type) {
+        node.addEventListener(type, function() {
+          failures.push('Received a ' + type + ' event');
+        });
+      };
+    };
+    var body = document.body;
+    [ 'DOMSubtreeModified',
+      'DOMNodeInserted',
+      'DOMNodeRemoved',
+      'DOMAttrModified',
+      'DOMCharacterDataModified' ].forEach(addListener(body));
+
+    var div = document.createElement('div');
+    [ 'DOMNodeInsertedIntoDocument',
+      'DOMNodeRemovedFromDocument' ].forEach(addListener(div));
+
+    // DOMSubtreeModified, DOMNodeInserted{,IntoDocument}
+    body.appendChild(div);
+    // DOMSubtreeModified, DOMAttrModified
+    div.setAttribute('data-foo', 'bar');
+    // DOMNodeInserted
+    var text = div.appendChild(document.createTextNode('hello'));
+    // DOMCharacterDataModified
+    text = 'goodbye';
+    // DOMNodeRemoved, DOMNodeRemovedFromDocument
+    body.removeChild(div);
+
+    if (failures.length)
+      chrome.test.fail(failures.join('\n'));
+    else
+      chrome.test.succeed();
+  }
+]);