WIP: diff which plumbs through the event URL.

chrome/test/data/extensions/webui/sanity_check_available_apis.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.
 
 // out/Debug/browser_tests \
 //    --gtest_filter=ExtensionWebUITest.SanityCheckAvailableAPIs
 
 // There should be a limited number of chrome.* APIs available to webui. Sanity
 // check them here.
 //
 // NOTE:  Of course, update this list if/when more APIs are made available.
 // NOTE2: Apologies to other people putting things on chrome which aren't
 //        related and whose tests fail.
 
 var expected = [
   'csi',
   'getVariableValue',
   'loadTimes',
   'runtime',
   'send',
   'test',
 ];
 var actual = Object.keys(chrome).sort();
 
-if (!chrome.test.checkDeepEq(expected, actual)) {
+var isEqual = expected.length == actual.length;
+for (var i = 0; i < expected.length && isEqual; i++) {
+  if (expected[i] != actual[i])
+    isEqual = false;
+}
+
+if (isEqual) {
+  domAutomationController.send(true);
+} else {
   console.error('Expected: ' + JSON.stringify(expected) + ', ' +
                 'Actual: ' + JSON.stringify(actual));
   domAutomationController.send(false);
-} else {
-  domAutomationController.send(true);
 }