[turbofan] Use FastCloneShallow[Array|Object]Stub if possible.

src/code-factory.h

Index: src/code-factory.h
diff --git a/src/code-factory.h b/src/code-factory.h
index f8af73b18ea06650dde8b321cf2b950f7038ad21..94c4be83bd312eb56c427744cecc53ff8458325c 100644
--- a/src/code-factory.h
+++ b/src/code-factory.h
@@ -65,6 +65,9 @@ class CodeFactory FINAL {
   static Callable StringAdd(Isolate* isolate, StringAddFlags flags,
                             PretenureFlag pretenure_flag);
 
+  static Callable FastCloneShallowArray(Isolate* isolate);
+  static Callable FastCloneShallowObject(Isolate* isolate, int length);
+
   static Callable AllocateHeapNumber(Isolate* isolate);
 
   static Callable CallFunction(Isolate* isolate, int argc,