[turbofan] Fix type of JSCreateClosure to be Function.

src/compiler/typer.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/compiler/typer.h"
 
 #include "src/base/flags.h"
 #include "src/bootstrapper.h"
 #include "src/compilation-dependencies.h"
 #include "src/compiler/common-operator.h"
@@ skipping 1199 matching lines @@
   return Type::OtherObject();
 }
 
 
 Type* Typer::Visitor::TypeJSCreateArray(Node* node) {
   return Type::OtherObject();
 }
 
 
 Type* Typer::Visitor::TypeJSCreateClosure(Node* node) {
-  return Type::OtherObject();
+  return Type::Function();
 }
 
 
 Type* Typer::Visitor::TypeJSCreateLiteralArray(Node* node) {
   return Type::OtherObject();
 }
 
 
 Type* Typer::Visitor::TypeJSCreateLiteralObject(Node* node) {
   return Type::OtherObject();
@@ skipping 1180 matching lines @@
   }
   if (Type::IsInteger(*value)) {
     return Type::Range(value->Number(), value->Number(), zone());
   }
   return Type::Constant(value, zone());
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8