Add a move constructor and move assignment operator to KURL

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 37 matching lines @@
 public:
     KURL()
         : m_isValid(false)
         , m_protocolIsInHTTPFamily(false)
     {
     }
 
     KURL(const KURL&);
     KURL& operator=(const KURL&);
 
+#if COMPILER_SUPPORTS(CXX_RVALUE_REFERENCES)
+    KURL(KURL&&);
+    KURL& operator=(KURL&&);
+#endif
+
     // The argument is an absolute URL string. The string is assumed to be
     // output of KURL::string() called on a valid KURL object, or indiscernible
     // from such. It is usually best to avoid repeatedly parsing a string,
     // unless memory saving outweigh the possible slow-downs.
     KURL(ParsedURLStringTag, const String&);
     explicit KURL(WTF::HashTableDeletedValueType);
 
     // Creates an isolated URL object suitable for sending to another thread.
     static KURL createIsolated(ParsedURLStringTag, const String&);
 
@@ skipping 203 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