Create optimized inline versions of Map and Set initialization

src/collection.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.
 
 "use strict";
 
 // This file relies on the fact that the following declaration has been made
 // in runtime.js:
 // var $Array = global.Array;
 
@@ skipping 12 matching lines @@
   var iter, adder;
 
   if (!IS_NULL_OR_UNDEFINED(iterable)) {
     iter = GetIterator(ToObject(iterable));
     adder = this.add;
     if (!IS_SPEC_FUNCTION(adder)) {
       throw MakeTypeError('property_not_function', ['add', this]);
     }
   }
 
-  %SetInitialize(this);
+  %_SetInitialize(this);
 
   if (IS_UNDEFINED(iter)) return;
 
   var next, done;
   while (!(next = iter.next()).done) {
     if (!IS_SPEC_OBJECT(next)) {
       throw MakeTypeError('iterator_result_not_an_object', [next]);
     }
     %_CallFunction(this, next.value, adder);
   }
@@ skipping 119 matching lines @@
   var iter, adder;
 
   if (!IS_NULL_OR_UNDEFINED(iterable)) {
     iter = GetIterator(ToObject(iterable));
     adder = this.set;
     if (!IS_SPEC_FUNCTION(adder)) {
       throw MakeTypeError('property_not_function', ['set', this]);
     }
   }
 
-  %MapInitialize(this);
+  %_MapInitialize(this);
 
   if (IS_UNDEFINED(iter)) return;
 
   var next, done, nextItem;
   while (!(next = iter.next()).done) {
     if (!IS_SPEC_OBJECT(next)) {
       throw MakeTypeError('iterator_result_not_an_object', [next]);
     }
     nextItem = next.value;
     if (!IS_SPEC_OBJECT(nextItem)) {
@@ skipping 111 matching lines @@
     "get", MapGetJS,
     "set", MapSetJS,
     "has", MapHasJS,
     "delete", MapDeleteJS,
     "clear", MapClearJS,
     "forEach", MapForEach
   ));
 }
 
 SetUpMap();