Begin using ChromeVox Next to read tab and window titles.

chrome/browser/resources/chromeos/chromevox/testing/chromevox_next_e2e_test_base.js

 // Copyright 2014 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 test fixture.
 GEN_INCLUDE(['chromevox_e2e_test_base.js']);
 
 /**
  * Base test fixture for ChromeVox Next end to end tests.
  *
@@ skipping 31 matching lines @@
    * NOTE: Callbacks creatd instide |opt_callback| must be wrapped with
    * |this.newCallback| if passed to asynchonous calls.  Otherwise, the test
    * will be finished prematurely.
    * @param {function() : void} doc Snippet wrapped inside of a function.
    * @param {function(chrome.automation.AutomationNode)} callback
    *     Called once the document is ready.
    */
   runWithLoadedTree: function(doc, callback) {
     callback = this.newCallback(callback);
     chrome.automation.getDesktop(function(r) {
-      this.runWithTab(doc, function(newTabUrl) {
-        var listener = function(evt) {
-          if (!evt.target.docUrl || evt.target.docUrl != newTabUrl)

[dmazzoni, 2016/05/25 15:18:00]

I think making this change could break tests with iframes. We need runWithTab to
be able to wait for a specific loadComplete, not just any loadComplete.

[David Tseng, 2016/05/25 16:08:23]

I'm a little surprised this worked before because we add the listener
potentially after the tab already opens.

[dmazzoni, 2016/05/25 16:10:35]

That's true, it'd probably be better to register the listener first.

[David Tseng, 2016/05/25 17:27:28]

Added the ability to wait for a specific url and a utility method to create a
url for a data doc (applying what seem to be the same string operations
accessibility does).

At the moment, I'm seeing load complete fired on the root after iframes. If that
changes, we can use the above.

[David Tseng, 2016/05/26 20:50:19]

FYI; I filed
crbug.com/615192> 

-            return;
+      var listener = function(evt) {
+        if (evt.target.url.indexOf('data') != 0)
+          return;
 
-          r.removeEventListener('loadComplete', listener, true);
-          global.backgroundObj.onGotCommand('nextObject');
-          callback && callback(evt.target);
-          callback = null;
-        };
-        r.addEventListener('loadComplete', listener, true);
-      }.bind(this));
+        r.removeEventListener('loadComplete', listener, true);
+        global.backgroundObj.onGotCommand('nextObject');
+        callback && callback(evt.target);
+        callback = null;
+      };
+      r.addEventListener('loadComplete', listener, true);
+      this.runWithTab(doc);
     }.bind(this));
   },
 
   listenOnce: function(node, eventType, callback, capture) {
     var innerCallback = this.newCallback(function() {
       node.removeEventListener(eventType, innerCallback, capture);
       callback.apply(this, arguments);
     });
     node.addEventListener(eventType, innerCallback, capture);
   }
 };