Simplify collections.js now that it's wrapped in an IIFE

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;
 
 var $Set = global.Set;
 var $Map = global.Map;
 
 
-// Used by harmony-templates.js
-var $MapGet;
-var $MapSet;
-
-
 (function() {
 
+%CheckIsBootstrapping();
+
 
 function HashToEntry(table, hash, numBuckets) {
   var bucket = ORDERED_HASH_TABLE_HASH_TO_BUCKET(hash, numBuckets);
   return ORDERED_HASH_TABLE_BUCKET_AT(table, bucket);
 }
 %SetInlineBuiltinFlag(HashToEntry);
 
 
 function SetFindEntry(table, numBuckets, key, hash) {
   var keyIsNaN = IS_NUMBER(key) && NUMBER_IS_NAN(key);
@@ skipping 199 matching lines @@
   var value_array = [UNDEFINED];
   while (%SetIteratorNext(iterator, value_array)) {
     if (stepping) %DebugPrepareStepInIfStepping(f);
     key = value_array[0];
     var new_receiver = needs_wrapper ? ToObject(receiver) : receiver;
     %_CallFunction(new_receiver, key, key, this, f);
   }
 }
 
 
-// -------------------------------------------------------------------
+%SetCode($Set, SetConstructor);
+%FunctionSetPrototype($Set, new $Object());
+%AddNamedProperty($Set.prototype, "constructor", $Set, DONT_ENUM);
+%AddNamedProperty(
+    $Set.prototype, symbolToStringTag, "Set", DONT_ENUM | READ_ONLY);
 
-function SetUpSet() {
-  %CheckIsBootstrapping();
+%FunctionSetLength(SetForEach, 1);
 
-  %SetCode($Set, SetConstructor);
-  %FunctionSetPrototype($Set, new $Object());
-  %AddNamedProperty($Set.prototype, "constructor", $Set, DONT_ENUM);
-  %AddNamedProperty(
-      $Set.prototype, symbolToStringTag, "Set", DONT_ENUM | READ_ONLY);
-
-  %FunctionSetLength(SetForEach, 1);
-
-  // Set up the non-enumerable functions on the Set prototype object.
-  InstallGetter($Set.prototype, "size", SetGetSize);
-  InstallFunctions($Set.prototype, DONT_ENUM, $Array(
-    "add", SetAdd,
-    "has", SetHas,
-    "delete", SetDelete,
-    "clear", SetClearJS,
-    "forEach", SetForEach
-  ));
-}
-
-SetUpSet();
+// Set up the non-enumerable functions on the Set prototype object.
+InstallGetter($Set.prototype, "size", SetGetSize);
+InstallFunctions($Set.prototype, DONT_ENUM, $Array(
+  "add", SetAdd,
+  "has", SetHas,
+  "delete", SetDelete,
+  "clear", SetClearJS,
+  "forEach", SetForEach
+));
 
 
 // -------------------------------------------------------------------
 // Harmony Map
 
 function MapConstructor(iterable) {
   if (!%_IsConstructCall()) {
     throw MakeTypeError('constructor_not_function', ['Map']);
   }
 
@@ skipping 151 matching lines @@
   var stepping = DEBUG_IS_ACTIVE && %DebugCallbackSupportsStepping(f);
   var value_array = [UNDEFINED, UNDEFINED];
   while (%MapIteratorNext(iterator, value_array)) {
     if (stepping) %DebugPrepareStepInIfStepping(f);
     var new_receiver = needs_wrapper ? ToObject(receiver) : receiver;
     %_CallFunction(new_receiver, value_array[1], value_array[0], this, f);
   }
 }
 
 
-// -------------------------------------------------------------------
+%SetCode($Map, MapConstructor);
+%FunctionSetPrototype($Map, new $Object());
+%AddNamedProperty($Map.prototype, "constructor", $Map, DONT_ENUM);
+%AddNamedProperty(
+    $Map.prototype, symbolToStringTag, "Map", DONT_ENUM | READ_ONLY);
 
-function SetUpMap() {
-  %CheckIsBootstrapping();
+%FunctionSetLength(MapForEach, 1);
 
-  %SetCode($Map, MapConstructor);
-  %FunctionSetPrototype($Map, new $Object());
-  %AddNamedProperty($Map.prototype, "constructor", $Map, DONT_ENUM);
-  %AddNamedProperty(
-      $Map.prototype, symbolToStringTag, "Map", DONT_ENUM | READ_ONLY);
-
-  %FunctionSetLength(MapForEach, 1);
-
-  // Set up the non-enumerable functions on the Map prototype object.
-  InstallGetter($Map.prototype, "size", MapGetSize);
-  InstallFunctions($Map.prototype, DONT_ENUM, $Array(
-    "get", MapGet,
-    "set", MapSet,
-    "has", MapHas,
-    "delete", MapDelete,
-    "clear", MapClearJS,
-    "forEach", MapForEach
-  ));
-
-  $MapGet = MapGet;
-  $MapSet = MapSet;
-}
-
-SetUpMap();
+// Set up the non-enumerable functions on the Map prototype object.
+InstallGetter($Map.prototype, "size", MapGetSize);
+InstallFunctions($Map.prototype, DONT_ENUM, $Array(
+  "get", MapGet,
+  "set", MapSet,
+  "has", MapHas,
+  "delete", MapDelete,
+  "clear", MapClearJS,
+  "forEach", MapForEach
+));
 
 })();