Bindings: Add ScalarValueString support

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,
@@ skipping 362 matching lines @@
     intptr_t toIntPtr(bool* ok = 0) const;
 
     // FIXME: Like the strict functions above, these give false for "ok" when there is trailing garbage.
     // Like the non-strict functions above, these return the value when there is trailing garbage.
     // It would be better if these were more consistent with the above functions instead.
     double toDouble(bool* ok = 0) const;
     float toFloat(bool* ok = 0) const;
 
     bool percentage(int& percentage) const;
 
+    // Returns a string which is guaranteed to be composed of Unicode
+    // scalar values, i.e. if the string is a 16-bit string, it is valid
+    // UTF-16 containing no unpaired surrogates.
+    String toScalarValueString() const;
+
     String isolatedCopy() const;
     bool isSafeToSendToAnotherThread() const;
 
 #if USE(CF)
     String(CFStringRef);
     RetainPtr<CFStringRef> createCFString() const;
 #endif
 
 #ifdef __OBJC__
     String(NSString*);
@@ skipping 308 matching lines @@
 using WTF::charactersToFloat;
 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