[ES5] Made properties of the arguments array enumerable.

Review URL: http://codereview.chromium.org/200141


git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@2897 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/handles.cc

@@ -531,14 +531,7 @@ Handle<FixedArray> GetKeysInFixedArrayFor(Handle<JSObject> object,
                                           KeyCollectionType type) {
   Handle<FixedArray> content = Factory::empty_fixed_array();
 
-  JSObject* arguments_boilerplate =
-      Top::context()->global_context()->arguments_boilerplate();
-  JSFunction* arguments_function =
-      JSFunction::cast(arguments_boilerplate->map()->constructor());
-  bool allow_enumeration = (object->map()->constructor() != arguments_function);
-
   // Only collect keys if access is permitted.
-  if (allow_enumeration) {
   for (Handle<Object> p = object;
        *p != Heap::null_value();
        p = Handle<Object>(p->GetPrototype())) {
@@ -582,7 +575,6 @@ Handle<FixedArray> GetKeysInFixedArrayFor(Handle<JSObject> object,
     if (type == LOCAL_ONLY)
       break;
   }
-  }
   return content;
 }
 

test/mjsunit/arguments-enum.js

@@ -42,11 +42,11 @@ function setArgumentCount() {
 }
 
 assertEquals(0, countArguments());
-assertEquals(0, countArguments(1));
-assertEquals(0, countArguments(1, 2));
-assertEquals(0, countArguments(1, 2, 3, 4, 5));
+assertEquals(1, countArguments(1));
+assertEquals(2, countArguments(1, 2));
+assertEquals(5, countArguments(1, 2, 3, 4, 5));
 
-assertEquals(0, setArgumentCount());
-assertEquals(0, setArgumentCount(1));
-assertEquals(0, setArgumentCount(1, 2));
-assertEquals(0, setArgumentCount(1, 2, 3, 4, 5));
+assertEquals(2, setArgumentCount());
+assertEquals(3, setArgumentCount(1));
+assertEquals(4, setArgumentCount(1, 2));
+assertEquals(7, setArgumentCount(1, 2, 3, 4, 5));

test/mjsunit/third_party/object-keys.js

@@ -52,7 +52,7 @@ assertEquals(Object.keys(x), []);
 assertEquals(Object.keys(function () {}), []);
 
 function argsTest(a, b, c) {
-  assertEquals([], Object.keys(arguments));
+  assertEquals([0, 1, 2], Object.keys(arguments));
 }
 
 argsTest(1, 2, 3);