[turbofan] Switch message object manipulation to JSOperator.

src/compiler/typer.cc

Index: src/compiler/typer.cc
diff --git a/src/compiler/typer.cc b/src/compiler/typer.cc
index 4eff814823bfa23e66c4f72828c7fa0474c149e4..d4fc9b648b5aae8350b71f5a7bf0d214fd82f26d 100644
--- a/src/compiler/typer.cc
+++ b/src/compiler/typer.cc
@@ -1574,6 +1574,15 @@ Type* Typer::Visitor::TypeJSForInStep(Node* node) {
 }
 
 
+Type* Typer::Visitor::TypeJSLoadMessage(Node* node) { return Type::Any(); }
+
+
+Type* Typer::Visitor::TypeJSStoreMessage(Node* node) {
+  UNREACHABLE();
+  return nullptr;
+}
+
+
 Type* Typer::Visitor::TypeJSStackCheck(Node* node) { return Type::Any(); }