[builtins] FastNewClosureStub becomes a builtin.

src/code-factory.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/code-factory.h"
 
 #include "src/bootstrapper.h"
 #include "src/ic/ic.h"
 
 namespace v8 {
@@ skipping 359 matching lines @@
 
 // static
 Callable CodeFactory::FastNewFunctionContext(Isolate* isolate,
                                              ScopeType scope_type) {
   FastNewFunctionContextStub stub(isolate, scope_type);
   return make_callable(stub);
 }
 
 // static
 Callable CodeFactory::FastNewClosure(Isolate* isolate) {
-  FastNewClosureStub stub(isolate);
-  return make_callable(stub);
+  return Callable(isolate->builtins()->FastNewClosure(),
+                  FastNewClosureDescriptor(isolate));
 }
 
 // static
 Callable CodeFactory::FastNewObject(Isolate* isolate) {
   FastNewObjectStub stub(isolate);
   return make_callable(stub);
 }
 
 // static
 Callable CodeFactory::FastNewRestParameter(Isolate* isolate,
@@ skipping 122 matching lines @@
 }
 
 // static
 Callable CodeFactory::FunctionPrototypeBind(Isolate* isolate) {
   return Callable(isolate->builtins()->FunctionPrototypeBind(),
                   BuiltinDescriptor(isolate));
 }
 
 }  // namespace internal
 }  // namespace v8