[es6] Object.getOwnPropertyDescriptor should wrap primitives

src/v8natives.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.
 
 // This file relies on the fact that the following declarations have been made
 // in runtime.js:
 // var $Object = global.Object;
 // var $Boolean = global.Boolean;
 // var $Number = global.Number;
 // var $Function = global.Function;
@@ skipping 982 matching lines @@
   }
 
   if (IS_SPEC_OBJECT(obj)) {
     %SetPrototype(obj, proto);
   }
 
   return obj;
 }
 
 
-// ES5 section 15.2.3.3
+// ES6 section 19.1.2.6
 function ObjectGetOwnPropertyDescriptor(obj, p) {
-  if (!IS_SPEC_OBJECT(obj)) {
-    throw MakeTypeError("called_on_non_object",
-                        ["Object.getOwnPropertyDescriptor"]);
-  }
-  var desc = GetOwnPropertyJS(obj, p);
+  var desc = GetOwnPropertyJS(TO_OBJECT_INLINE(obj), p);
   return FromPropertyDescriptor(desc);
 }
 
 
 // For Harmony proxies
 function ToNameArray(obj, trap, includeSymbols) {
   if (!IS_SPEC_OBJECT(obj)) {
     throw MakeTypeError("proxy_non_object_prop_names", [obj, trap]);
   }
   var n = ToUint32(obj.length);
@@ skipping 875 matching lines @@
   }
   if (!IS_SPEC_FUNCTION(method)) {
     throw MakeTypeError('not_iterable', [obj]);
   }
   var iterator = %_CallFunction(obj, method);
   if (!IS_SPEC_OBJECT(iterator)) {
     throw MakeTypeError('not_an_iterator', [iterator]);
   }
   return iterator;
 }