[turbofan] Use FastNewClosureStub if possible.

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/base/flags.h"
 #include "src/bootstrapper.h"
 #include "src/compiler/graph-reducer.h"
 #include "src/compiler/js-operator.h"
 #include "src/compiler/node.h"
 #include "src/compiler/node-properties.h"
@@ skipping 1293 matching lines @@
 
 
 // JS object operators.
 
 
 Bounds Typer::Visitor::TypeJSCreate(Node* node) {
   return Bounds(Type::None(), Type::Object());
 }
 
 
+Bounds Typer::Visitor::TypeJSCreateClosure(Node* node) {
+  return Bounds(Type::None(), Type::OtherObject());
+}
+
+
 Type* Typer::Visitor::JSLoadPropertyTyper(Type* object, Type* name, Typer* t) {
   // TODO(rossberg): Use range types and sized array types to filter undefined.
   if (object->IsArray() && name->Is(Type::Integral32())) {
     return Type::Union(
         object->AsArray()->Element(), Type::Undefined(), t->zone());
   }
   return Type::Any();
 }
 
 
@@ skipping 1022 matching lines @@
       TYPED_ARRAYS(TYPED_ARRAY_CASE)
 #undef TYPED_ARRAY_CASE
     }
   }
   return Type::Constant(value, zone());
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8