Make data: urls always parse async

LayoutTests/html5lib/resources/runner.js

 // Copyright (c) 2008 Geoffrey Sneddon
 //
 // Permission is hereby granted, free of charge, to any person obtaining a copy
 // of this software and associated documentation files (the "Software"), to deal
 // in the Software without restriction, including without limitation the rights
 // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 // copies of the Software, and to permit persons to whom the Software is
 // furnished to do so, subject to the following conditions:
 //
 // The above copyright notice and this permission notice shall be included in
@@ skipping 35 matching lines @@
 
 iframe.contentWindow.document.open()
 iframe.contentWindow.document.write("Test");
 iframe.contentWindow.document.close();
 var write = iframe.contentWindow.document.lastChild.lastChild.lastChild !== null;
 var ignoreTitle = iframe.contentWindow.document.getElementsByTagName("title")[0] !== undefined;
 
 if (window.forceDataURLs)
     write = false;
 
-if (!write && window.internals && internals.settings.setUseThreadedHTMLParserForDataURLs)
-    internals.settings.setUseThreadedHTMLParserForDataURLs(true);
-
 window.onload = function()
 {
     stat.data = "Running";
     run();
 }
 
 function run()
 {
     var xhr = window.XMLHttpRequest ? new XMLHttpRequest() : new ActiveXObject("Microsoft.XMLHTTP");
     if (file = test_files.shift())
@@ skipping 132 matching lines @@
 {
     result = Markup.get(result);
     if (result !== expected)
     {
         fail_list.push(test_number);
         log += "\n\nTest " + (test_number) + " of " + (test_number + tests.length) + " in " + file + " failed. Input:\n" + input + "\nGot:\n" + result + "\nExpected:\n" + expected;
     }
     test_number++;
     test();
 }