[turbofan] Also constant-fold Object.getPrototypeOf if possible.

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 29ca61c1000e7857476ca231704064e48403a01c..48ec33f9f2b4f428a8479ff5eda216a5bb45baae 100644
--- a/src/compiler/js-call-reducer.h
+++ b/src/compiler/js-call-reducer.h
@@ -47,7 +47,10 @@ class JSCallReducer final : public AdvancedReducer {
   Reduction ReduceFunctionPrototypeApply(Node* node);
   Reduction ReduceFunctionPrototypeCall(Node* node);
   Reduction ReduceFunctionPrototypeHasInstance(Node* node);
+  Reduction ReduceObjectGetPrototype(Node* node, Node* object);
+  Reduction ReduceObjectGetPrototypeOf(Node* node);
   Reduction ReduceObjectPrototypeGetProto(Node* node);
+  Reduction ReduceReflectGetPrototypeOf(Node* node);
   Reduction ReduceSpreadCall(Node* node, int arity);
   Reduction ReduceJSConstruct(Node* node);
   Reduction ReduceJSConstructWithSpread(Node* node);