Remove unnecessary includes from KURL.h

Source/platform/mhtml/MHTMLParser.h

 /*
  * 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 16 matching lines @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef MHTMLParser_h
 #define MHTMLParser_h
 
 #include "platform/SharedBufferChunkReader.h"
 #include "wtf/RefPtr.h"
 #include "wtf/Vector.h"
-#include "wtf/text/WTFString.h"
+
+namespace WTF {
+class String;
+}
 
 namespace WebCore {
 
 class ArchiveResource;
 class MHTMLArchive;
 class MIMEHeader;
 class SharedBuffer;
 
 class PLATFORM_EXPORT MHTMLParser {
 public:
@@ skipping 15 matching lines @@
 
     SharedBufferChunkReader m_lineReader;
     Vector<RefPtr<ArchiveResource> > m_resources;
     Vector<RefPtr<MHTMLArchive> > m_frames;
 };
 
 }
 
 #endif