[compiler] Support Object.create(null) inlining in TF

src/runtime/runtime-object.cc

Index: src/runtime/runtime-object.cc
diff --git a/src/runtime/runtime-object.cc b/src/runtime/runtime-object.cc
index d1e57c00dd93577db40e91c9bcd8bc0ab086c896..e3518d3e09ea68e0036f906b98f71c70c8dffd20 100644
--- a/src/runtime/runtime-object.cc
+++ b/src/runtime/runtime-object.cc
@@ -222,30 +222,8 @@ RUNTIME_FUNCTION(Runtime_ObjectCreate) {
   // function's initial map from the current native context.
   // TODO(bmeurer): Use a dedicated cache for Object.create; think about
   // slack tracking for Object.create.
-  Handle<Map> map(isolate->native_context()->object_function()->initial_map(),
-                  isolate);
-  if (map->prototype() != *prototype) {
-    if (prototype->IsNull(isolate)) {
-      map = isolate->slow_object_with_null_prototype_map();
-    } else if (prototype->IsJSObject()) {
-      Handle<JSObject> js_prototype = Handle<JSObject>::cast(prototype);
-      if (!js_prototype->map()->is_prototype_map()) {
-        JSObject::OptimizeAsPrototype(js_prototype, FAST_PROTOTYPE);
-      }
-      Handle<PrototypeInfo> info =
-          Map::GetOrCreatePrototypeInfo(js_prototype, isolate);
-      // TODO(verwaest): Use inobject slack tracking for this map.
-      if (info->HasObjectCreateMap()) {
-        map = handle(info->ObjectCreateMap(), isolate);
-      } else {
-        map = Map::CopyInitialMap(map);
-        Map::SetPrototype(map, prototype, FAST_PROTOTYPE);
-        PrototypeInfo::SetObjectCreateMap(info, map);
-      }
-    } else {
-      map = Map::TransitionToPrototype(map, prototype, REGULAR_PROTOTYPE);
-    }
-  }
+  Handle<Map> map =
+      Map::GetObjectCreateMap(Handle<HeapObject>::cast(prototype));
 
   bool is_dictionary_map = map->is_dictionary_map();
   Handle<FixedArray> object_properties;