Make js-test-post a noop.

LayoutTests/fast/js/resources/js-test-pre.js

 // svg/dynamic-updates tests set enablePixelTesting=true, as we want to dump text + pixel results
 if (self.testRunner) {
     if (self.enablePixelTesting)
         testRunner.dumpAsTextWithPixelResults();
     else
         testRunner.dumpAsText();
 }
 
 var description, debug, successfullyParsed, errorMessage;
 
@@ skipping 55 matching lines @@
             "font-family: monospace;" +
         "}";
 
     function insertStyleSheet()
     {
         var styleElement = document.createElement("style");
         styleElement.textContent = css;
         (document.head || document.documentElement).appendChild(styleElement);
     }
 
-    if (!isWorker())
+    function handleTestFinished()
+    {
+        // FIXME: Get rid of this boolean.
+        wasPostTestScriptParsed = true;
+        if (window.jsTestIsAsync) {
+            if (window.testRunner)
+                testRunner.waitUntilDone();
+            if (window.wasFinishJSTestCalled)
+                finishJSTest();
+        } else
+            finishJSTest();
+    }
+
+    if (!isWorker()) {
+        window.addEventListener('DOMContentLoaded', handleTestFinished, false);
         insertStyleSheet();
+    }
 
     if (!self.isOnErrorTest) {
         self.onerror = function(message)
         {
             errorMessage = message;
         };
     }
-
 })();
 
 function isWorker()
 {
     // It's conceivable that someone would stub out 'document' in a worker so
     // also check for childNodes, an arbitrary DOM-related object that is
     // meaningless in a WorkerContext.
     return (typeof document === 'undefined' || typeof document.childNodes === 'undefined') && !!self.importScripts;
 }
 
@@ skipping 575 matching lines @@
     testPassed = function(msg) {
         workerPort.postMessage('PASS:' + msg);
     }
     finishJSTest = function() {
         workerPort.postMessage('DONE:');
     }
     debug = function(msg) {
         workerPort.postMessage(msg);
     }
 }