Make js-test-post a noop.

LayoutTests/fast/encoding/resources/invalid-xml.js

Index: LayoutTests/fast/encoding/resources/invalid-xml.js
diff --git a/LayoutTests/fast/encoding/resources/invalid-xml.js b/LayoutTests/fast/encoding/resources/invalid-xml.js
index 0d1ca7c4a8ffb952b88ddc2e6d902be1d1c9e1ba..80af08bca03646913c49d1b77225949c3d2bcdda 100644
--- a/LayoutTests/fast/encoding/resources/invalid-xml.js
+++ b/LayoutTests/fast/encoding/resources/invalid-xml.js
@@ -21,17 +21,14 @@ var encodingTests = [
 function runNextTest()
 {
     if (currentTest >= encodingTests.length) {
-        var script = document.createElement("script");
-        script.src = "../js/resources/js-test-post.js";
-        if (window.testRunner)
-            script.setAttribute("onload", "testRunner.notifyDone()");
-        document.body.appendChild(script);
         iframe.parentNode.removeChild(iframe);
+        finishJSTest();
         return;
     }
     iframe.src = "resources/" + encodingTests[currentTest++];
 }
 
+window.jsTestIsAsync = true;
 if (window.testRunner)
     testRunner.waitUntilDone();