Build WTF as dll in component build

Tools/DumpRenderTree/chromium/TestShell.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 122 matching lines @@
 {
     m_testInterfaces = adoptPtr(new WebTestInterfaces());
     platformSupport->setInterfaces(m_testInterfaces.get());
     m_devToolsTestInterfaces = adoptPtr(new WebTestInterfaces());
     m_prerenderingSupport = adoptPtr(new MockWebPrerenderingSupport());
 #if !defined(USE_DEFAULT_RENDER_THEME) && (OS(WINDOWS) || OS(DARWIN))
     // Set theme engine.
     webkit_support::SetThemeEngine(m_testInterfaces->themeEngine());
 #endif
 
-    WTF::initializeThreading();
-
     if (m_threadedCompositingEnabled)
         m_webCompositorThread = adoptPtr(WebKit::Platform::current()->createThread("Compositor"));
     webkit_support::SetThreadedCompositorEnabled(m_threadedCompositingEnabled);
 
     createMainWindow();
 }
 
 void TestShell::createMainWindow()
 {
     m_drtDevToolsAgent = adoptPtr(new DRTDevToolsAgent);
@@ skipping 401 matching lines @@
     for (size_t index = 0; index < entryCount; ++index) {
         WebHistoryItem historyItem = navigationController.entryAtIndex(index)->contentState();
         if (historyItem.isNull()) {
             historyItem.initialize();
             historyItem.setURLString(navigationController.entryAtIndex(index)->URL().spec().utf16());
         }
         result[index] = historyItem;
     }
     history->swap(result);
 }