Crankshaft support for polymorphic array handling

src/ast.h

Index: src/ast.h
diff --git a/src/ast.h b/src/ast.h
index 56bda6b1a4f8d512fc17b45c3c83b8198599df47..af6f505504f1a08fe1d2b303cae0ff222db7709b 100644
--- a/src/ast.h
+++ b/src/ast.h
@@ -1423,7 +1423,8 @@ class CountOperation: public Expression {
         expression_(expr),
         pos_(pos),
         assignment_id_(GetNextId()),
-        count_id_(GetNextId()) { }
+        count_id_(GetNextId()),
+        receiver_types_(NULL) { }
 
   DECLARE_NODE_TYPE(CountOperation)
 
@@ -1447,6 +1448,7 @@ class CountOperation: public Expression {
   virtual Handle<Map> GetMonomorphicReceiverType() {
     return monomorphic_receiver_type_;
   }
+  virtual ZoneMapList* GetReceiverTypes() { return receiver_types_; }
 
   // Bailout support.
   int AssignmentId() const { return assignment_id_; }
@@ -1461,6 +1463,7 @@ class CountOperation: public Expression {
   int assignment_id_;
   int count_id_;
   Handle<Map> monomorphic_receiver_type_;
+  ZoneMapList* receiver_types_;
 };