Move CrossThreadCopier from platform/ to wtf/

third_party/WebKit/Source/wtf/text/WTFString.h

 /*
  * (C) 1999 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012, 2013 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  *
  */
 
 #ifndef WTFString_h
 #define WTFString_h
 
 // This file would be called String.h, but that conflicts with <string.h>
 // on systems without case-sensitive file systems.
 
 #include "wtf/Allocator.h"
+#include "wtf/CrossThreadCopier.h"
 #include "wtf/HashTableDeletedValueType.h"
 #include "wtf/WTFExport.h"
 #include "wtf/text/ASCIIFastPath.h"
 #include "wtf/text/StringImpl.h"
 #include <algorithm>
 #include <iosfwd>
 
 #ifdef __OBJC__
 #include <objc/objc.h>
 #endif
@@ skipping 382 matching lines @@
 
     template <typename CharacterType>
     void removeInternal(const CharacterType*, unsigned, int);
 
     template <typename CharacterType>
     void appendInternal(CharacterType);
 
     RefPtr<StringImpl> m_impl;
 };
 
+template <>
+struct CrossThreadCopier<String> {
+    STATIC_ONLY(CrossThreadCopier);
+    typedef String Type;
+    WTF_EXPORT static Type copy(const String&);
+};
+
 #undef DISPATCH_CASE_OP
 
 inline bool operator==(const String& a, const String& b) { return equal(a.impl(), b.impl()); }
 inline bool operator==(const String& a, const LChar* b) { return equal(a.impl(), b); }
 inline bool operator==(const String& a, const char* b) { return equal(a.impl(), reinterpret_cast<const LChar*>(b)); }
 inline bool operator==(const LChar* a, const String& b) { return equal(a, b.impl()); }
 inline bool operator==(const char* a, const String& b) { return equal(reinterpret_cast<const LChar*>(a), b.impl()); }
 template<size_t inlineCapacity>
 inline bool operator==(const Vector<char, inlineCapacity>& a, const String& b) { return equal(b.impl(), a.data(), a.size()); }
 template<size_t inlineCapacity>
@@ skipping 213 matching lines @@
 using WTF::charactersAreAllASCII;
 using WTF::equal;
 using WTF::equalIgnoringCase;
 using WTF::find;
 using WTF::isAllSpecialCharacters;
 using WTF::isSpaceOrNewline;
 using WTF::reverseFind;
 
 #include "wtf/text/AtomicString.h"
 #endif // WTFString_h