Remove JSFunctionResultCache.

src/string.js

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 (function(global, utils) {
 
 %CheckIsBootstrapping();
 
 // -------------------------------------------------------------------
 // Imports
@@ skipping 528 matching lines @@
   // overwrite it.
   return result + %_SubString(subject, endOfMatch, subject.length);
 }
 
 
 // ECMA-262 section 15.5.4.12
 function StringSearch(re) {
   CHECK_OBJECT_COERCIBLE(this, "String.prototype.search");
 
   var regexp;
-  if (IS_STRING(re)) {
-    regexp = %_GetFromCache(STRING_TO_REGEXP_CACHE_ID, re);
-  } else if (IS_REGEXP(re)) {
+  if (IS_REGEXP(re)) {
     regexp = re;
   } else {
     regexp = new GlobalRegExp(re);
   }
   var match = RegExpExec(regexp, TO_STRING_INLINE(this), 0);
   if (match) {
     return match[CAPTURE0];
   }
   return -1;
 }
@@ skipping 638 matching lines @@
   to.StringIndexOf = StringIndexOfJS;
   to.StringLastIndexOf = StringLastIndexOfJS;
   to.StringMatch = StringMatchJS;
   to.StringReplace = StringReplace;
   to.StringSplit = StringSplitJS;
   to.StringSubstr = StringSubstr;
   to.StringSubstring = StringSubstring;
 });
 
 })