Revert of Accessibility: Ignore all anonymous blocks

chrome/test/data/extensions/api_test/automation/tests/tabs/queryselector.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.
 
 var allTests = [
   // Basic query from root node.
   function testQuerySelector() {
-    var cancelButton = rootNode.children[3];
+    var cancelButton = rootNode.lastChild.lastChild;
     function assertCorrectResult(queryResult) {
       assertEq(queryResult, cancelButton);
       chrome.test.succeed();
     }
     rootNode.domQuerySelector('body > button:nth-of-type(2)',
                               assertCorrectResult);
   },
 
   function testQuerySelectorNoMatch() {
     function assertCorrectResult(queryResult) {
@@ skipping 13 matching lines @@
     function assertCorrectResult(queryResult) {
       assertEq(queryResult, p);
       chrome.test.succeed();
     }
     main.domQuerySelector('p', assertCorrectResult);
   },
 
   // Demonstrates that a query for an element which is ignored for accessibility
   // returns its nearest ancestor.
   function testQuerySelectorForSpanInsideButtonReturnsButton() {
-    var okButton = rootNode.children[2];
+    var okButton = rootNode.lastChild.firstChild;
     function assertCorrectResult(queryResult) {
       assertEq(queryResult, okButton);
       chrome.test.succeed();
     }
     rootNode.domQuerySelector('#span-in-button', assertCorrectResult);
   },
 
+  // Demonstrates that querying from an anonymous node may have unexpected
+  // results.
+  function testQuerySelectorFromAnonymousGroup() {
+    var h1 = rootNode.firstChild.firstChild;
+    var group = rootNode.lastChild;
+    function assertCorrectResult(queryResult) {
+      assertEq(h1, queryResult);
+      chrome.test.succeed();
+    }
+    group.domQuerySelector('h1', assertCorrectResult);
+  },
+
   function testQuerySelectorFromRemovedNode() {
     var group = rootNode.firstChild;
     function assertCorrectResult(queryResult) {
       assertEq(null, queryResult);
       var errorMsg =
           'domQuerySelector sent on node which is no longer in the tree.';
       assertEq(errorMsg, chrome.extension.lastError.message);
       assertEq(errorMsg, chrome.runtime.lastError.message);
 
       chrome.test.succeed();
     }
     function afterRemoveChild() {
       group.domQuerySelector('h1', assertCorrectResult);
     }
     chrome.tabs.executeScript(
         { code: 'document.body.removeChild(document.body.firstElementChild)' },
         afterRemoveChild);
   }
 ];
 
 setUpAndRunTests(allTests, 'complex.html');