Make js-test-post a noop.

LayoutTests/svg/dynamic-updates/resources/SVGTestCase.js

 // Force activating pixel tests - this variable is used in fast/js/resources/js-test-pre.js, when calling setDumpAsText().
 window.enablePixelTesting = true;
 
 var svgNS = "http://www.w3.org/2000/svg";
 var xlinkNS = "http://www.w3.org/1999/xlink";
 var xhtmlNS = "http://www.w3.org/1999/xhtml";
 
 var rootSVGElement;
 var iframeElement;
 
 function createSVGElement(name) {
     return document.createElementNS(svgNS, "svg:" + name);
 }
 
 function shouldHaveBBox(element, width, height)
 {
     shouldBe(element + ".getBBox().width", width);
     shouldBe(element + ".getBBox().height", height);
 }
 
 function createSVGTestCase() {
+    window.jsTestIsAsync = true;
     if (window.testRunner)
         testRunner.waitUntilDone();
 
     rootSVGElement = createSVGElement("svg");
     rootSVGElement.setAttribute("width", "300");
     rootSVGElement.setAttribute("height", "300");
 
     var bodyElement = document.documentElement.lastChild;
     bodyElement.insertBefore(rootSVGElement, document.getElementById("description"));
 }
 
 function embedSVGTestCase(uri) {
+    window.jsTestIsAsync = true;
     if (window.testRunner)
         testRunner.waitUntilDone();
 
     iframeElement = document.createElement("iframe");
     iframeElement.setAttribute("style", "width: 300px; height: 300px;");
     iframeElement.setAttribute("src", uri);
     iframeElement.setAttribute("onload", "iframeLoaded()");
 
     var bodyElement = document.documentElement.lastChild;
     bodyElement.insertBefore(iframeElement, document.getElementById("description"));
 }
 
 function iframeLoaded() {
     rootSVGElement = iframeElement.getSVGDocument().rootElement;
 }
 
 function clickAt(x, y) {
     // Translation due to <h1> above us
     x = x + rootSVGElement.offsetLeft;
     y = y + rootSVGElement.offsetTop;
 
     if (window.eventSender) {
         eventSender.mouseMoveTo(x, y);
         eventSender.mouseDown();
         eventSender.mouseUp();
     }
 }
 
 function completeTest() {
-    var script = document.createElement("script");
-
-    script.onload = function() {
-        if (window.testRunner)
-            testRunner.notifyDone();
-    };
-
-    script.src = "../../fast/js/resources/js-test-post.js";
-    document.body.appendChild(script);
+    finishJSTest();
 }