Begin using ChromeVox Next to read tab and window titles.

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

Index: chrome/browser/resources/chromeos/chromevox/testing/chromevox_next_e2e_test_base.js
diff --git a/chrome/browser/resources/chromeos/chromevox/testing/chromevox_next_e2e_test_base.js b/chrome/browser/resources/chromeos/chromevox/testing/chromevox_next_e2e_test_base.js
index 14d7727f70f0e368bea90df668fdaa6938e27048..bb88f2bc78a731bd330ad63e43ec0115a87448d2 100644
--- a/chrome/browser/resources/chromeos/chromevox/testing/chromevox_next_e2e_test_base.js
+++ b/chrome/browser/resources/chromeos/chromevox/testing/chromevox_next_e2e_test_base.js
@@ -49,18 +49,17 @@ ChromeVoxNextE2ETest.prototype = {
   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));
   },