Remove early returns in fullscreen tests

LayoutTests/fullscreen/video-specified-size.html

Index: LayoutTests/fullscreen/video-specified-size.html
diff --git a/LayoutTests/fullscreen/video-specified-size.html b/LayoutTests/fullscreen/video-specified-size.html
index 86ada9010abeb077cdff337a02de4c4853fc2f53..4850445f5774a30ac30c3f4f644cc6f5e19c754b 100644
--- a/LayoutTests/fullscreen/video-specified-size.html
+++ b/LayoutTests/fullscreen/video-specified-size.html
@@ -9,13 +9,7 @@
     <script>
         setSrcById("video", findMediaFile("video", "../media/content/test"));
         var video = document.getElementById('video');
-        // Bail out early if the full screen API is not enabled or is missing:
-        if (Element.prototype.webkitRequestFullScreen == undefined) {
-            logResult(false, "Element.prototype.webkitRequestFullScreen == undefined");
-            endTest();
-        } else {
-            waitForEventTestAndEnd(document, 'webkitfullscreenchange', "video.clientWidth==document.body.clientWidth");
-            runWithKeyDown(function(){video.webkitRequestFullScreen()});
-        }
+        waitForEventTestAndEnd(document, 'webkitfullscreenchange', "video.clientWidth==document.body.clientWidth");
+        runWithKeyDown(function(){video.webkitRequestFullScreen()});
     </script>
 </body>