Remove flags for ES2015 features shipped in M48

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) {
 
 %CheckIsBootstrapping();
 
 // -------------------------------------------------------------------
 // Imports
 
 var ExpandReplacement;
-var FLAG_harmony_tolength;
 var GlobalObject = global.Object;
 var GlobalRegExp = global.RegExp;
 var GlobalRegExpPrototype;
 var InternalArray = utils.InternalArray;
 var InternalPackedArray = utils.InternalPackedArray;
 var MakeTypeError;
 var matchSymbol = utils.ImportNow("match_symbol");
 var replaceSymbol = utils.ImportNow("replace_symbol");
 var searchSymbol = utils.ImportNow("search_symbol");
 var splitSymbol = utils.ImportNow("split_symbol");
 
-utils.ImportFromExperimental(function(from) {
-  FLAG_harmony_tolength = from.FLAG_harmony_tolength;
-});
-
 utils.Import(function(from) {
   ExpandReplacement = from.ExpandReplacement;
   MakeTypeError = from.MakeTypeError;
 });
 
 // -------------------------------------------------------------------
 
 // Property of the builtins object for recording the result of the last
 // regexp match.  The property RegExpLastMatchInfo includes the matchIndices
 // array of the last successful regexp match (an array of start/end index
@@ skipping 130 matching lines @@
   if (!IS_REGEXP(this)) {
     throw MakeTypeError(kIncompatibleMethodReceiver,
                         'RegExp.prototype.exec', this);
   }
 
   string = TO_STRING(string);
   var lastIndex = this.lastIndex;
 
   // Conversion is required by the ES2015 specification (RegExpBuiltinExec
   // algorithm, step 4) even if the value is discarded for non-global RegExps.
-  var i = TO_LENGTH_OR_INTEGER(lastIndex);
+  var i = TO_LENGTH(lastIndex);
 
   var updateLastIndex = REGEXP_GLOBAL(this) || REGEXP_STICKY(this);
   if (updateLastIndex) {
     if (i < 0 || i > string.length) {
       this.lastIndex = 0;
       return null;
     }
   } else {
     i = 0;
   }
@@ skipping 26 matching lines @@
   if (!IS_REGEXP(this)) {
     throw MakeTypeError(kIncompatibleMethodReceiver,
                         'RegExp.prototype.test', this);
   }
   string = TO_STRING(string);
 
   var lastIndex = this.lastIndex;
 
   // Conversion is required by the ES2015 specification (RegExpBuiltinExec
   // algorithm, step 4) even if the value is discarded for non-global RegExps.
-  var i = TO_LENGTH_OR_INTEGER(lastIndex);
+  var i = TO_LENGTH(lastIndex);
 
   if (REGEXP_GLOBAL(this) || REGEXP_STICKY(this)) {
     if (i < 0 || i > string.length) {
       this.lastIndex = 0;
       return false;
     }
     // matchIndices is either null or the RegExpLastMatchInfo array.
     var matchIndices = %_RegExpExec(this, string, i, RegExpLastMatchInfo);
     if (IS_NULL(matchIndices)) {
       this.lastIndex = 0;
@@ skipping 505 matching lines @@
 // Exports
 
 utils.Export(function(to) {
   to.RegExpExec = DoRegExpExec;
   to.RegExpExecNoTests = RegExpExecNoTests;
   to.RegExpLastMatchInfo = RegExpLastMatchInfo;
   to.RegExpTest = RegExpTest;
 });
 
 })