Revert of id of iframe incorrectly sets window name

LayoutTests/fast/frames/detach-frame-during-focus.html

 <script>
 if (window.testRunner) {
     testRunner.waitUntilDone();
     testRunner.dumpAsText();
 }
 
 addEventListener('change', function(e) {
     document.body.appendChild(document.getElementById('frame1'));
 }, false);
 
 var didStartTest = false;
 function startTest() {
     if (didStartTest)
         return;
-    didStartTest = true;
-    var frameWindow = document.getElementById('frame1').contentWindow;
-    frameWindow.innerInput.focus();
+    didStartTest = true;;
+    frame1.innerInput.focus();
     outerInput.focus();
     document.execCommand('inserttext', false, 'abc');
-    frameWindow.innerInput.focus();
+    frame1.innerInput.focus();
     document.body.appendChild(document.createTextNode('PASS'));
     testRunner.notifyDone();
 }
 </script>
 <div>
  <input value="foo" id="outerInput">
  <iframe onload="startTest()" id="frame1" height="100" width="540" srcdoc="&lt;input id='innerInput'>"></iframe>
 </div>