Count closures using the feedback vector cell map, specialize if count==1.

src/factory.h

 // 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.
 
 #ifndef V8_FACTORY_H_
 #define V8_FACTORY_H_
 
 #include "src/feedback-vector.h"
 #include "src/globals.h"
 #include "src/isolate.h"
@@ skipping 355 matching lines @@
   Handle<FixedTypedArrayBase> NewFixedTypedArray(
       int length, ExternalArrayType array_type, bool initialize,
       PretenureFlag pretenure = NOT_TENURED);
 
   Handle<Cell> NewCell(Handle<Object> value);
 
   Handle<PropertyCell> NewPropertyCell();
 
   Handle<WeakCell> NewWeakCell(Handle<HeapObject> value);
 
+  Handle<Cell> NewNoClosuresCell(Handle<Object> value);
+  Handle<Cell> NewOneClosureCell(Handle<Object> value);
+  Handle<Cell> NewManyClosuresCell(Handle<Object> value);
+
   Handle<TransitionArray> NewTransitionArray(int capacity);
 
   // Allocate a tenured AllocationSite. It's payload is null.
   Handle<AllocationSite> NewAllocationSite();
 
   Handle<Map> NewMap(
       InstanceType type,
       int instance_size,
       ElementsKind elements_kind = TERMINAL_FAST_ELEMENTS_KIND);
 
@@ skipping 455 matching lines @@
   void SetStrictFunctionInstanceDescriptor(Handle<Map> map,
                                            FunctionMode function_mode);
 
   void SetClassFunctionInstanceDescriptor(Handle<Map> map);
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_FACTORY_H_