Implement a part of ProcessingInstruction by using PrivateScript

LayoutTests/fast/xsl/xslt-text.html

Index: LayoutTests/fast/xsl/xslt-text.html
diff --git a/LayoutTests/fast/xsl/xslt-text.html b/LayoutTests/fast/xsl/xslt-text.html
index ff6f81393e2aa0a662d341ec77530d2588d7494c..efbf28fc17b08a063d86ac446395baa10078e89f 100644
--- a/LayoutTests/fast/xsl/xslt-text.html
+++ b/LayoutTests/fast/xsl/xslt-text.html
@@ -1,3 +1,4 @@
+<script src='resources/test-xslt.js'></script>
 <script>
     if (window.testRunner) {
         testRunner.dumpAsText();
@@ -10,10 +11,12 @@
         console.appendChild(document.createTextNode(message + "\n"));
     }
 
-    function dumpDOM(doc)
+    function dumpDOM(iframe)
     {
-        log(doc.documentElement.innerHTML);
+        waitXSLTransform(iframe, function() {
+            log(iframe.contentDocument.documentElement.innerHTML);
+        });
     }
 </script>
 <pre id="console"></pre>
-<iframe onload="dumpDOM(this.contentDocument)" src="resources/xslt-text.xml"></iframe>
+<iframe onload="dumpDOM(this)" src="resources/xslt-text.xml"></iframe>