Removed fullscreen test timeouts to prevent flakiness.

LayoutTests/fullscreen/full-screen-iframe-without-allow-attribute-allowed-from-parent.html

 <p>Test entering full screen security restrictions. An iframe without an allow attribute
 is still permitted to fullscreen if the request comes from the containing document.</p>
 <p>To test manually, press any key - the page should enter full screen mode.</p>
 <script src="full-screen-test.js"></script>
 <script>
 window.onmessage = function (e) {
     frame = document.getElementById('frame');
 
     test("document.webkitFullscreenEnabled");
     consoleWrite("iframe's webkitFullscreenEnabled should be false:");
     iframeMessage = e.data;
     test("iframeMessage == 'document.webkitFullscreenEnabled == false'");
 
     waitForEvent(document, 'webkitfullscreenchange', function() {
             consoleWrite("SUCCEED - entered full screen!");
             endTest();
     });
 
     runWithKeyDown(function() {
-        setTimeout(function() {
-            consoleWrite("FAIL - did not enter full screen!");
-            endTest();
-        }, 50);
         frame.webkitRequestFullScreen();
     });
 }
 </script>
 <iframe id="frame" src='data:text/html,
     iframe
     <script>
         parent.postMessage("document.webkitFullscreenEnabled == " + document.webkitFullscreenEnabled, "*");
     </script>
     '>
 </iframe>