[es7] refactor and fix Object.values() / Object.entries()

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index b08989bde33cfb497848112b6d13cf5e312d772b..fdb8d00e91042242d9b7211da99a25b197fe7e20 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -1965,6 +1965,14 @@ class JSReceiver: public HeapObject {
       Handle<JSReceiver> object, KeyCollectionType type, PropertyFilter filter,
       GetKeysConversion keys_conversion = KEEP_NUMBERS);
 
+  MUST_USE_RESULT static MaybeHandle<FixedArray> GetOwnValues(
+      Handle<JSReceiver> object, PropertyFilter filter,
+      GetKeysConversion keys_conversion = KEEP_NUMBERS);
+
+  MUST_USE_RESULT static MaybeHandle<FixedArray> GetOwnEntries(
+      Handle<JSReceiver> object, PropertyFilter filter,
+      GetKeysConversion keys_conversion = KEEP_NUMBERS);
+
   // Layout description.
   static const int kPropertiesOffset = HeapObject::kHeaderSize;
   static const int kHeaderSize = HeapObject::kHeaderSize + kPointerSize;