Make js-test-post a noop.

LayoutTests/fast/forms/state-restore-hidden.html

Index: LayoutTests/fast/forms/state-restore-hidden.html
diff --git a/LayoutTests/fast/forms/state-restore-hidden.html b/LayoutTests/fast/forms/state-restore-hidden.html
index c9ba7f9c72c1ae348b0dd436cce037b9ce94d63f..2e67527b1b35851287dbc7fd3f348cf084df09c0 100644
--- a/LayoutTests/fast/forms/state-restore-hidden.html
+++ b/LayoutTests/fast/forms/state-restore-hidden.html
@@ -15,6 +15,8 @@
 <script>
 description("Bug 77391 - Hidden form elements do not save their state prior to form submission");
 
+window.jsTestIsAsync = true;
+
 function runTest() {
     var state = document.getElementById("emptyOnFirstVisit");
     if (!state.value) {
@@ -30,15 +32,8 @@ function runTest() {
         // Second visit.
         shouldBeEqualToString("document.f.hidden.value", "after");
         successfullyParsed = true;
-        
-        var script = document.createElement('script');
-        script.src = "../js/resources/js-test-post.js";
-        script.type = "text/javascript";
-        script.onload = function() {
-            if (window.testRunner)
-                testRunner.notifyDone();
-        };
-        document.body.appendChild(script);
+
+        finishJSTest();
     }
 }
 </script>