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

Source/web/tests/ScrollingCoordinatorChromiumTest.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:
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
  *     notice, this list of conditions and the following disclaimer in the
@@ skipping 47 matching lines @@
     }
 
     virtual ~ScrollingCoordinatorChromiumTest()
     {
         Platform::current()->unitTestSupport()->unregisterAllMockedURLs();
     }
 
     void navigateTo(const std::string& url)
     {
         FrameTestHelpers::loadFrame(webViewImpl()->mainFrame(), url);
+        Platform::current()->unitTestSupport()->serveAsynchronousMockedRequests();
     }
 
     void forceFullCompositingUpdate()
     {
         webViewImpl()->layout();
     }
 
     void registerMockedHttpURLLoad(const std::string& fileName)
     {
         URLTestHelpers::registerMockedURLFromBaseURL(WebString::fromUTF8(m_baseURL.c_str()), WebString::fromUTF8(fileName.c_str()));
@@ skipping 363 matching lines @@
 TEST_F(ScrollingCoordinatorChromiumTest, setupScrollbarLayerShouldNotCrash)
 {
     registerMockedHttpURLLoad("setup_scrollbar_layer_crash.html");
     navigateTo(m_baseURL + "setup_scrollbar_layer_crash.html");
     forceFullCompositingUpdate();
     // This test document setup an iframe with scrollbars, then switch to
     // an empty document by javascript.
 }
 
 } // namespace