Revert of Fix webkit_unit_tests to use the threaded parser and enable everywhere.

Source/web/tests/PrerenderingTest.cpp

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 172 matching lines @@
     }
 
     void initialize(const char* baseURL, const char* fileName)
     {
         URLTestHelpers::registerMockedURLFromBaseURL(WebString::fromUTF8(baseURL), WebString::fromUTF8(fileName));
         const bool RunJavascript = true;
         m_webViewHelper.initialize(RunJavascript);
         m_webViewHelper.webView()->setPrerendererClient(&m_prerendererClient);
 
         FrameTestHelpers::loadFrame(m_webViewHelper.webView()->mainFrame(), std::string(baseURL) + fileName);
+        Platform::current()->unitTestSupport()->serveAsynchronousMockedRequests();
     }
 
     void navigateAway()
     {
         FrameTestHelpers::loadFrame(m_webViewHelper.webView()->mainFrame(), "about:blank");
     }
 
     void close()
     {
         m_webViewHelper.webView()->mainFrame()->collectGarbage();
@@ skipping 295 matching lines @@
     WebPrerender relNextOnly = prerendererClient()->releaseWebPrerender();
     EXPECT_EQ(toWebURL("http://rel-next-only.com/"), relNextOnly.url());
     EXPECT_EQ(PrerenderRelTypeNext, relNextOnly.relTypes());
 
     WebPrerender relNextAndPrerender = prerendererClient()->releaseWebPrerender();
     EXPECT_EQ(toWebURL("http://rel-next-and-prerender.com/"), relNextAndPrerender.url());
     EXPECT_EQ(static_cast<unsigned>(PrerenderRelTypeNext | PrerenderRelTypePrerender), relNextAndPrerender.relTypes());
 }
 
 } // namespace