Suggestion for 1717.

src/string.js

 // Copyright 2006-2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 813 matching lines @@
   %SetProperty($String.prototype, "constructor", $String, DONT_ENUM);
 
 
   // Setup the non-enumerable functions on the String object.
   InstallFunctions($String, DONT_ENUM, $Array(
     "fromCharCode", StringFromCharCode
   ));
 
 
   // Setup the non-enumerable functions on the String prototype object.
-  InstallFunctions($String.prototype, DONT_ENUM, $Array(
+  InstallFunctionsOnHiddenPrototype($String.prototype, DONT_ENUM, $Array(
     "valueOf", StringValueOf,
     "toString", StringToString,
     "charAt", StringCharAt,
     "charCodeAt", StringCharCodeAt,
     "concat", StringConcat,
     "indexOf", StringIndexOf,
     "lastIndexOf", StringLastIndexOf,
     "localeCompare", StringLocaleCompare,
     "match", StringMatch,
     "replace", StringReplace,
@@ skipping 18 matching lines @@
     "small", StringSmall,
     "strike", StringStrike,
     "sub", StringSub,
     "sup", StringSup,
     "toJSON", StringToJSON
   ));
 }
 
 
 SetupString();