Tests for changes to Blink in Issues 19697008. This adds new javascript to the

chrome/test/data/extensions/api_test/activity_log_private/friend/reply.js

 // Copyright 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 defaultUrl = 'http://www.google.com';
 
 // Utility function to open a URL in a new tab.  If the useIncognito global is
 // true, the URL is opened in a new incognito window, otherwise it is opened in
 // a new tab in the current window.  Alternatively, whether to use incognito
 // can be specified as a second argument which overrides the global setting.
@@ skipping 306 matching lines @@
           'var testContext = testCanvas.getContext("2d");';
 
   // Does an XHR from inside a content script.
   code += 'var request = new XMLHttpRequest(); ' +
           'request.open("POST", "http://www.cnn.com", false); ' +
           'request.setRequestHeader("Content-type", ' +
           '                         "text/plain;charset=UTF-8"); ' +
           'request.send(); ' +
           'document.write("sent an XHR");';
 
+  // This function is used as a handler for hooking mouse and keyboard events.
+  code += 'function handlerHook(event) { };';
+
+  hookNames = ['onclick', 'ondblclick', 'ondrag', 'ondragend', 'ondragenter',
+               'ondragleave', 'ondragover', 'ondragstart', 'ondrop', 'oninput',
+               'onkeydown', 'onkeypress', 'onkeyup', 'onmousedown',
+               'onmouseenter', 'onmouseleave', 'onmousemove', 'onmouseout',
+               'onmouseover', 'onmouseup', 'onmousewheel'];
+
+  // Access to each hook can be monitored for Element, Document, and Window.
+  for (var i = 0; i < hookNames.length; i++) {
+    // handler on Element
+    code += 'document.body.' + hookNames[i] + ' = handlerHook;';
+
+    // handler on a Document
+    code += 'document.' + hookNames[i] + ' = handlerHook;';
+
+    // handler on a Window
+    code += 'window.' + hookNames[i] + ' = handlerHook;';
+  }
+
   chrome.tabs.onUpdated.addListener(
     function callback(tabId, changeInfo, tab) {
       if (changeInfo['status'] === 'complete' &&
           tab.url.match(/google\.com/g)) {
         chrome.tabs.onUpdated.removeListener(callback);
         chrome.tabs.executeScript(
              tabId, {'code': code},
              function() {
                chrome.tabs.remove(tabId);
                appendCompleted('executeDOMChangesOnTabUpdated');
@@ skipping 83 matching lines @@
   }
   if ($('incognito_checkbox') != null) {
     $('incognito_checkbox').addEventListener(
         'click',
         function() { useIncognito = $('incognito_checkbox').checked; });
   }
   completed = 0;
   appendCompleted('setup events');
 }
 document.addEventListener('DOMContentLoaded', setupEvents);