Fix match default behavior on strings for ES2015 semantics

src/js/regexp.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) {
 
 'use strict';
 
 %CheckIsBootstrapping();
 
@@ skipping 761 matching lines @@
   utils.InstallGetterSetter(GlobalRegExp, '$' + i, RegExpMakeCaptureGetter(i),
                             NoOpSetter, DONT_DELETE);
 }
 %ToFastProperties(GlobalRegExp);
 
 // -------------------------------------------------------------------
 // Exports
 
 utils.Export(function(to) {
   to.RegExpExec = DoRegExpExec;
-  to.RegExpExecNoTests = RegExpExecNoTests;
   to.RegExpLastMatchInfo = RegExpLastMatchInfo;
   to.RegExpTest = RegExpTest;
   to.IsRegExp = IsRegExp;
 });
 
 })