[turbofan] Use FastNewClosureStub if possible.

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/v8.h"
 
 #include "src/bootstrapper.h"
 #include "src/code-factory.h"
 #include "src/ic/ic.h"
 
@@ skipping 141 matching lines @@
 
 
 // static
 Callable CodeFactory::FastCloneShallowObject(Isolate* isolate, int length) {
   FastCloneShallowObjectStub stub(isolate, length);
   return Callable(stub.GetCode(), stub.GetCallInterfaceDescriptor());
 }
 
 
 // static
+Callable CodeFactory::FastNewClosure(Isolate* isolate,
+                                     LanguageMode language_mode,
+                                     FunctionKind kind) {
+  FastNewClosureStub stub(isolate, language_mode, kind);
+  return Callable(stub.GetCode(), stub.GetCallInterfaceDescriptor());
+}
+
+
+// static
 Callable CodeFactory::AllocateHeapNumber(Isolate* isolate) {
   AllocateHeapNumberStub stub(isolate);
   return Callable(stub.GetCode(), stub.GetCallInterfaceDescriptor());
 }
 
 
 // static
 Callable CodeFactory::CallFunction(Isolate* isolate, int argc,
                                    CallFunctionFlags flags) {
   CallFunctionStub stub(isolate, argc, flags);
   return Callable(stub.GetCode(), stub.GetCallInterfaceDescriptor());
 }
 
 }  // namespace internal
 }  // namespace v8