Remove unused includes from various .cpp files in core/

Source/core/page/PerformanceResourceTiming.cpp

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  * Copyright (C) 2012 Intel 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.
@@ skipping 18 matching lines @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "config.h"
 #include "core/page/PerformanceResourceTiming.h"
 
 #include <wtf/Vector.h>
 #include "core/dom/Document.h"
 #include "core/loader/DocumentLoadTiming.h"
 #include "core/loader/DocumentLoader.h"
-#include "core/platform/KURL.h"
 #include "core/platform/network/ResourceRequest.h"
 #include "core/platform/network/ResourceResponse.h"
 #include "weborigin/SecurityOrigin.h"
 
 namespace WebCore {
 
 static double monotonicTimeToDocumentMilliseconds(Document* document, double seconds)
 {
     ASSERT(seconds >= 0.0);
     return document->loader()->timing()->monotonicTimeToZeroBasedDocumentTime(seconds) * 1000.0;
@@ skipping 153 matching lines @@
 
 double PerformanceResourceTiming::responseEnd() const
 {
     if (!m_finishTime)
         return responseStart();
 
     return monotonicTimeToDocumentMilliseconds(m_requestingDocument.get(), m_finishTime);
 }
 
 } // namespace WebCore