Wrap harmony implementations in functions.

src/harmony-array.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';
 
-// This file relies on the fact that the following declaration has been made
-// in runtime.js:
-// var $Array = global.Array;
+%CheckIsBootstrapping();
+
+var GlobalArray = global.Array;
+var GlobalSymbol = global.Symbol;
 
 // -------------------------------------------------------------------
 
 // ES6 draft 07-15-13, section 15.4.3.23
 function ArrayFind(predicate /* thisArg */) {  // length == 1
   CHECK_OBJECT_COERCIBLE(this, "Array.prototype.find");
 
   var array = ToObject(this);
   var length = ToInteger(array.length);
 
@@ skipping 181 matching lines @@
   var array = %IsConstructor(constructor) ? new constructor(length) : [];
   for (var i = 0; i < length; i++) {
     %AddElement(array, i, %_Arguments(i), NONE);
   }
   array.length = length;
   return array;
 }
 
 // -------------------------------------------------------------------
 
-function HarmonyArrayExtendSymbolPrototype() {
-  %CheckIsBootstrapping();
+InstallConstants(GlobalSymbol, [
+  // TODO(dslomov, caitp): Move to symbol.js when shipping
+  "isConcatSpreadable", symbolIsConcatSpreadable
+]);
 
-  InstallConstants(global.Symbol, [
-    // TODO(dslomov, caitp): Move to symbol.js when shipping
-    "isConcatSpreadable", symbolIsConcatSpreadable
-  ]);
-}
+%FunctionSetLength(ArrayFrom, 1);
 
-HarmonyArrayExtendSymbolPrototype();
+// Set up non-enumerable functions on the Array object.
+InstallFunctions(GlobalArray, DONT_ENUM, [
+  "from", ArrayFrom,
+  "of", ArrayOf
+]);
 
-function HarmonyArrayExtendArrayPrototype() {
-  %CheckIsBootstrapping();
+// Set up the non-enumerable functions on the Array prototype object.
+InstallFunctions(GlobalArray.prototype, DONT_ENUM, [
+  "find", ArrayFind,
+  "findIndex", ArrayFindIndex,
+  "fill", ArrayFill
+]);
 
-  %FunctionSetLength(ArrayFrom, 1);
-
-  // Set up non-enumerable functions on the Array object.
-  InstallFunctions($Array, DONT_ENUM, [
-    "from", ArrayFrom,
-    "of", ArrayOf
-  ]);
-
-  // Set up the non-enumerable functions on the Array prototype object.
-  InstallFunctions($Array.prototype, DONT_ENUM, [
-    "find", ArrayFind,
-    "findIndex", ArrayFindIndex,
-    "fill", ArrayFill
-  ]);
-}
-
-HarmonyArrayExtendArrayPrototype();
+})();