[turbofan] Inline Object.prototype.__proto__ getter.

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 5a949113d4c50543c616b94c65332af5eb720d23..81153f98dcae42a26e961e2492afcfac409b68e1 100644
--- a/src/compiler/js-call-reducer.h
+++ b/src/compiler/js-call-reducer.h
@@ -44,6 +44,7 @@ class JSCallReducer final : public AdvancedReducer {
   Reduction ReduceNumberConstructor(Node* node);
   Reduction ReduceFunctionPrototypeApply(Node* node);
   Reduction ReduceFunctionPrototypeCall(Node* node);
+  Reduction ReduceObjectPrototypeGetProto(Node* node);
   Reduction ReduceJSCallConstruct(Node* node);
   Reduction ReduceJSCallFunction(Node* node);