Revert 111028 - Support W3C Full Screen API proposal

LayoutTests/fullscreen/full-screen-request-removed.html

 <p>Test for <a href="https://bugs.webkit.org/show_bug.cgi?id=62320">bug 62320</a>: 
 Emit an error event when a request to enter full-screen is rejected.</p>
 <p>Tests that the document is still messaged if the element requesting full screen is removed before the event is generated.</p>
 <script src="full-screen-test.js"></script>
 <script>
 function runTest() {
     waitForEventAndEnd(document, 'webkitfullscreenchange', function() { 
             consoleWrite("FAIL - entered full screen!"); 
     });
 
     waitForEventAndEnd(document, 'webkitfullscreenerror', function() {
         consoleWrite("SUCCEED - did not enter full screen!");
     });
 
-    if (layoutTestController)
-        layoutTestController.setPopupBlockingEnabled(true);
-
     var div = document.createElement('div');
     document.documentElement.appendChild(div);
     consoleWrite("Added child element.")
     div.webkitRequestFullScreen();
     document.documentElement.removeChild(div);
     consoleWrite("Removed child element.")
 }
 
 runTest();
 </script>