Remove unused includes from various .cpp files in core/

Source/core/testing/MockPagePopupDriver.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
@@ skipping 10 matching lines @@
  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "config.h"
 #include "MockPagePopupDriver.h"
 
 #include "CSSPropertyNames.h"
 #include "CSSValueKeywords.h"
-#include "WebCoreTestSupport.h"
 #include "core/html/HTMLIFrameElement.h"
 #include "core/loader/DocumentLoader.h"
 #include "core/loader/DocumentWriter.h"
 #include "core/loader/FrameLoader.h"
 #include "core/page/Frame.h"
 #include "core/page/PagePopup.h"
 #include "core/page/PagePopupClient.h"
 #include "core/page/PagePopupController.h"
 #include "core/platform/Timer.h"
 
@@ skipping 94 matching lines @@
 {
     if (!popup || popup != m_mockPagePopup.get())
         return;
     m_mockPagePopup->closeLater();
     m_mockPagePopup.clear();
     m_pagePopupController->clearPagePopupClient();
     m_pagePopupController.clear();
 }
 
 }