Import latest web-platform-tests

third_party/WebKit/LayoutTests/imported/web-platform-tests/html/resources/common.js

 /*
 Distributed under both the W3C Test Suite License [1] and the W3C
 3-clause BSD License [2]. To contribute to a W3C Test Suite, see the
 policies and contribution forms [3].
 
 [1] http://www.w3.org/Consortium/Legal/2008/04-testsuite-license
 [2] http://www.w3.org/Consortium/Legal/2008/03-bsd-license
 [3] http://www.w3.org/2004/10/27-testcases
  */
 
@@ skipping 139 matching lines @@
                 break;
             }
         }
         if (!found) {
             assert_unreached(message + ". Fail reason:  element not found: "
                     + expected[i]);
         }
     }
 }
 
-function isVisible(el) {
-    return el.offsetTop != 0;
-}
-
 function isVoidElement(elementName) {
     return HTML5_VOID_ELEMENTS.indexOf(elementName) >= 0;
 }
 
 function checkTemplateContent(d, obj, html, id, nodeName) {
 
     obj.innerHTML = '<template id="tmpl">' + html + '</template>';
 
     var t = d.querySelector('#tmpl');
 
     if (id != null) {
         assert_equals(t.content.childNodes.length, 1, 'Element ' + nodeName
                 + ' should present among template nodes');
         assert_equals(t.content.firstChild.id, id, 'Wrong element ID');
     }
     if (nodeName != null) {
         assert_equals(t.content.firstChild.nodeName, nodeName.toUpperCase(),
                 'Wrong node name');
     }
 }
 
 function checkBodyTemplateContent(d, html, id, nodeName) {
     checkTemplateContent(d, d.body, html, id, nodeName);
 }
 
 function checkHeadTemplateContent(d, html, id, nodeName) {
     checkTemplateContent(d, d.head, html, id, nodeName);
 }