htmlTag was missing from the list of stringAttributes for an automationNode

chrome/test/data/extensions/api_test/automation/tests/tabs/attributes.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 ActiveDescendantAttribute = [ 'activeDescendant' ];
 var LinkAttributes = [ 'url' ];
 var DocumentAttributes = [ 'docUrl',
                            'docTitle',
                            'docLoaded',
                            'docLoadingProgress' ];
@@ skipping 282 matching lines @@
     assertTrue(Boolean(checkTest3));
     assertEq(checkTest3.checked, 'mixed');
 
     // Uncheckable nodes have a checked attribute of undefined
     var checkTest4 = rootNode.find({ attributes: { name: 'check-test-4' } });
     assertTrue(Boolean(checkTest4));
     assertEq(checkTest4.checked, undefined);
 
     chrome.test.succeed();
   },
+
+  function testHtmlTagAttribute() {
+    var figure = rootNode.find({ attributes: { htmlTag: 'figure' } });
+    assertTrue(Boolean(figure));
+    assertEq(figure.htmlTag, 'figure');
+
+    chrome.test.succeed();
+  }
 ];
 
 setUpAndRunTests(allTests, 'attributes.html');