[WIP] JSForInLowering and JSForInHasOwnProperty.

src/compiler/js-call-reducer.h

Index: src/compiler/js-call-reducer.h
diff --git a/src/compiler/js-call-reducer.h b/src/compiler/js-call-reducer.h
index 89197bc6201d50f032b8d59280a657343a5fb18e..8cd82816d34f7ef815c6048d1e8f05fc35dfdae9 100644
--- a/src/compiler/js-call-reducer.h
+++ b/src/compiler/js-call-reducer.h
@@ -47,6 +47,7 @@ class JSCallReducer final : public AdvancedReducer {
   Reduction ReduceFunctionPrototypeCall(Node* node);
   Reduction ReduceFunctionPrototypeHasInstance(Node* node);
   Reduction ReduceObjectPrototypeGetProto(Node* node);
+  Reduction ReduceObjectPrototypeHasOwnProperty(Node* node);
   Reduction ReduceSpreadCall(Node* node, int arity);
   Reduction ReduceJSConstruct(Node* node);
   Reduction ReduceJSConstructWithSpread(Node* node);