Add basic API support for Map & Set

src/runtime/runtime.h

Index: src/runtime/runtime.h
diff --git a/src/runtime/runtime.h b/src/runtime/runtime.h
index df616be9dfc4addd4d233c7c6112c4b31ecbe5b6..88073be78c1276d5a670fb7a8335f56263701185 100644
--- a/src/runtime/runtime.h
+++ b/src/runtime/runtime.h
@@ -850,6 +850,10 @@ class Runtime : public AllStatic {
       Isolate* isolate, Handle<FixedArray> literals,
       Handle<FixedArray> elements, bool is_strong);
 
+
+  static void JSMapInitialize(Isolate* isolate, Handle<JSMap> map);
+  static void JSSetInitialize(Isolate* isolate, Handle<JSSet> set);
+
   static void WeakCollectionInitialize(
       Isolate* isolate, Handle<JSWeakCollection> weak_collection);
   static void WeakCollectionSet(Handle<JSWeakCollection> weak_collection,