Remove early returns in fullscreen tests

LayoutTests/fullscreen/full-screen-child-not-allowed-crash.html

Index: LayoutTests/fullscreen/full-screen-child-not-allowed-crash.html
diff --git a/LayoutTests/fullscreen/full-screen-child-not-allowed-crash.html b/LayoutTests/fullscreen/full-screen-child-not-allowed-crash.html
index a1d172107bac9ba6a6ec567feedfa4e0c88eddd8..757bb39281591b8269711e92e4fe29d1743458e0 100644
--- a/LayoutTests/fullscreen/full-screen-child-not-allowed-crash.html
+++ b/LayoutTests/fullscreen/full-screen-child-not-allowed-crash.html
@@ -6,13 +6,7 @@
 <div id="div1">
 <script>
 var init = function() {
-    // 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 {
-        runWithKeyDown(function() { div1.webkitRequestFullScreen() });
-    }
+    runWithKeyDown(function() { div1.webkitRequestFullScreen() });
 
     frameset1 = document.createElementNS("http://www.w3.org/1999/xhtml", "frameset");
     document.body.appendChild(frameset1);