Remove unnecessary includes from KURL.h

Source/platform/weborigin/KURL.h

 /*
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2011, 2012 Apple 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 10 matching lines @@
  * 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.
  */
 
 #ifndef KURL_h
 #define KURL_h
 
 #include "platform/PlatformExport.h"
 #include "wtf/Forward.h"
-#include "wtf/HashMap.h"
 #include "wtf/HashTableDeletedValueType.h"
 #include "wtf/OwnPtr.h"
-#include "wtf/text/CString.h"
-#include "wtf/text/TextEncoding.h"
 #include "wtf/text/WTFString.h"
 #include <url/third_party/mozilla/url_parse.h>
 #include <url/url_canon.h>
 
+namespace WTF {
+class TextEncoding;
+}
+
 namespace WebCore {
 
 struct KURLHash;
 
 enum ParsedURLStringTag { ParsedURLString };
 
 class PLATFORM_EXPORT KURL {
 public:
     KURL()
         : m_isValid(false)
@@ skipping 218 matching lines @@
 
 // KURLHash is the default hash for String
 template<typename T> struct DefaultHash;
 template<> struct DefaultHash<WebCore::KURL> {
     typedef WebCore::KURLHash Hash;
 };
 
 } // namespace WTF
 
 #endif // KURL_h