Prune some internal objects' prototypes.

src/string.js

 // Copyright 2006-2009 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 896 matching lines @@
 // ReplaceResultBuilder support.
 function ReplaceResultBuilder(str) {
   if (%_ArgumentsLength() > 1) {
     this.elements = %_Arguments(1);
   } else {
     this.elements = new InternalArray();
   }
   this.special_string = str;
 }
 
+ReplaceResultBuilder.prototype.__proto__ = null;
+
 
 ReplaceResultBuilder.prototype.add = function(str) {
   str = TO_STRING_INLINE(str);
   if (str.length > 0) this.elements.push(str);
 }
 
 
 ReplaceResultBuilder.prototype.addSpecialSlice = function(start, end) {
   var len = end - start;
   if (start < 0 || len <= 0) return;
@@ skipping 63 matching lines @@
     "italics", StringItalics,
     "small", StringSmall,
     "strike", StringStrike,
     "sub", StringSub,
     "sup", StringSup
   ));
 }
 
 
 SetupString();