[es6] Map/Set size getter should have "get size" name

src/generator.js

 // Copyright 2013 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() {
 
 "use strict";
 
 %CheckIsBootstrapping();
 
@@ skipping 77 matching lines @@
 %NeverOptimizeFunction(GeneratorObjectNext);
 %NeverOptimizeFunction(GeneratorObjectThrow);
 
 // Set up non-enumerable functions on the generator prototype object.
 var GeneratorObjectPrototype = GeneratorFunctionPrototype.prototype;
 InstallFunctions(GeneratorObjectPrototype,
                  DONT_ENUM,
                  ["next", GeneratorObjectNext,
                   "throw", GeneratorObjectThrow]);
 
-%FunctionSetName(GeneratorObjectIterator, '[Symbol.iterator]');
+SetFunctionName(GeneratorObjectIterator, symbolIterator);
 %AddNamedProperty(GeneratorObjectPrototype, symbolIterator,
     GeneratorObjectIterator, DONT_ENUM | DONT_DELETE | READ_ONLY);
 %AddNamedProperty(GeneratorObjectPrototype, "constructor",
     GeneratorFunctionPrototype, DONT_ENUM | READ_ONLY);
 %AddNamedProperty(GeneratorObjectPrototype,
     symbolToStringTag, "Generator", DONT_ENUM | READ_ONLY);
 %InternalSetPrototype(GeneratorFunctionPrototype, GlobalFunction.prototype);
 %AddNamedProperty(GeneratorFunctionPrototype,
     symbolToStringTag, "GeneratorFunction", DONT_ENUM | READ_ONLY);
 %AddNamedProperty(GeneratorFunctionPrototype, "constructor",
     GeneratorFunction, DONT_ENUM | READ_ONLY);
 %InternalSetPrototype(GeneratorFunction, GlobalFunction);
 %SetCode(GeneratorFunction, GeneratorFunctionConstructor);
 
 })();