Removed fullscreen test timeouts to prevent flakiness.

LayoutTests/fullscreen/resources/full-screen-iframe-with-mixed-allow-webkitallow-iframe2.html

Index: LayoutTests/fullscreen/resources/full-screen-iframe-with-mixed-allow-webkitallow-iframe2.html
diff --git a/LayoutTests/fullscreen/resources/full-screen-iframe-with-mixed-allow-webkitallow-iframe2.html b/LayoutTests/fullscreen/resources/full-screen-iframe-with-mixed-allow-webkitallow-iframe2.html
index 787997f37cdaec648895396f8a107e93fb646625..c064aa206b425d056132dd328013c6ed583ac1c3 100644
--- a/LayoutTests/fullscreen/resources/full-screen-iframe-with-mixed-allow-webkitallow-iframe2.html
+++ b/LayoutTests/fullscreen/resources/full-screen-iframe-with-mixed-allow-webkitallow-iframe2.html
@@ -5,9 +5,6 @@
     <script>
         document.body.onclick = function() {
             document.body.webkitRequestFullScreen();
-            setTimeout(function() {
-                parent.postMessage("FAIL - did not enter full screen!", "*");
-            }, 50);
         };
         waitForEvent(document, 'webkitfullscreenchange', function() {
             parent.postMessage("SUCCEED - entered full screen!", "*");