Move String::isSafeToSendToAnotherThread to StringImpl.

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

 /*
  * Copyright (C) 2004, 2005, 2006, 2008 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
@@ skipping 132 matching lines @@
     // NOTE: Passing a zero size means use the whole string.
     static AtomicString fromUTF8(const char*, size_t length);
     static AtomicString fromUTF8(const char*);
 
     CString ascii() const { return m_string.ascii(); }
     CString latin1() const { return m_string.latin1(); }
     CString utf8(UTF8ConversionMode mode = LenientUTF8Conversion) const { return m_string.utf8(mode); }
 
     size_t charactersSizeInBytes() const { return m_string.charactersSizeInBytes(); }
 
+    bool isSafeToSendToAnotherThread() const { return m_string.isSafeToSendToAnotherThread(); }
+
 #ifndef NDEBUG
     void show() const;
 #endif
 
 private:
     String m_string;
 
     ALWAYS_INLINE static PassRefPtr<StringImpl> add(StringImpl* r)
     {
         if (!r || r->isAtomic())
@@ skipping 60 matching lines @@
 using WTF::AtomicString;
 using WTF::nullAtom;
 using WTF::emptyAtom;
 using WTF::starAtom;
 using WTF::xmlAtom;
 using WTF::xmlnsAtom;
 using WTF::xlinkAtom;
 
 #include "wtf/text/StringConcatenate.h"
 #endif // AtomicString_h