Fix webkit_unit_tests to use the threaded parser and enable everywhere.

Source/web/tests/AssociatedURLLoaderTest.cpp

 /*
  * Copyright (C) 2011 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 83 matching lines @@
         WebCore::KURL url = RegisterMockedUrl(urlRoot, "iframes_test.html");
         const char* iframeSupportFiles[] = {
             "invisible_iframe.html",
             "visible_iframe.html",
             "zero_sized_iframe.html",
         };
         for (size_t i = 0; i < arraysize(iframeSupportFiles); ++i) {
             RegisterMockedUrl(urlRoot, iframeSupportFiles[i]);
         }
 
-        WebURLRequest request;
-        request.initialize();
-        request.setURL(url);
-        mainFrame()->loadRequest(request);
-        serveRequests();
+        FrameTestHelpers::loadFrame(mainFrame(), url.string().utf8().data());
 
         Platform::current()->unitTestSupport()->unregisterMockedURL(url);
     }
 
     void TearDown()
     {
         Platform::current()->unitTestSupport()->unregisterAllMockedURLs();
     }
 
     void serveRequests()
@@ skipping 546 matching lines @@
     m_expectedLoader->loadAsynchronously(request, this);
     serveRequests();
     EXPECT_TRUE(m_didReceiveResponse);
     EXPECT_TRUE(m_didReceiveData);
     EXPECT_TRUE(m_didFinishLoading);
 
     EXPECT_FALSE(m_actualResponse.httpHeaderField(headerNameString).isEmpty());
 }
 
 }