Unify setting accessor properties in native code.

src/js/harmony-regexp.js

 // Copyright 2014 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 18 matching lines @@
         kRegExpNonObject, "RegExp.prototype.flags", TO_STRING(this));
   }
   var result = '';
   if (this.global) result += 'g';
   if (this.ignoreCase) result += 'i';
   if (this.multiline) result += 'm';
   if (this.unicode) result += 'u';
   if (this.sticky) result += 'y';
   return result;
 }
-%FunctionSetName(RegExpGetFlags, "RegExp.prototype.flags");
-%SetNativeFlag(RegExpGetFlags);
 
 
 // ES6 21.2.5.12.
 function RegExpGetSticky() {
   if (!IS_REGEXP(this)) {
     throw MakeTypeError(kRegExpNonRegExp, "RegExp.prototype.sticky");
   }
   return !!REGEXP_STICKY(this);
 }
 %FunctionSetName(RegExpGetSticky, "RegExp.prototype.sticky");
 %SetNativeFlag(RegExpGetSticky);
 
 
 // ES6 21.2.5.15.
 function RegExpGetUnicode() {
   if (!IS_REGEXP(this)) {
     throw MakeTypeError(kRegExpNonRegExp, "RegExp.prototype.unicode");
   }
   return !!REGEXP_UNICODE(this);
 }
 %FunctionSetName(RegExpGetUnicode, "RegExp.prototype.unicode");
 %SetNativeFlag(RegExpGetUnicode);
 
-%DefineGetterPropertyUnchecked(GlobalRegExp.prototype, 'flags',
-                               RegExpGetFlags, DONT_ENUM);
+utils.InstallGetter(GlobalRegExp.prototype, 'flags', RegExpGetFlags);
+utils.InstallGetter(GlobalRegExp.prototype, 'sticky', RegExpGetSticky);
+utils.InstallGetter(GlobalRegExp.prototype, 'unicode', RegExpGetUnicode);
 
-%DefineGetterPropertyUnchecked(GlobalRegExp.prototype, "sticky",
-                               RegExpGetSticky, DONT_ENUM);
-
-%DefineGetterPropertyUnchecked(GlobalRegExp.prototype, "unicode",
-                               RegExpGetUnicode, DONT_ENUM);
 })