[ic] Support data handlers that represent transitioning stores.

src/ic/ic.h

Index: src/ic/ic.h
diff --git a/src/ic/ic.h b/src/ic/ic.h
index e7312e2888b109006585fcc833e38b285d95b39e..9e69cc85d08bbb4b4e550f30e584ad961fa1a0cf 100644
--- a/src/ic/ic.h
+++ b/src/ic/ic.h
@@ -314,14 +314,6 @@ class LoadIC : public IC {
   // Creates a data handler that represents a load of a field by given index.
   Handle<Object> SimpleFieldLoad(FieldIndex index);
 
-  // Returns 0 if the validity cell check is enough to ensure that the
-  // prototype chain from |receiver_map| till |holder| did not change.
-  // If the |holder| is an empty handle then the full prototype chain is
-  // checked.
-  // Returns -1 if the handler has to be compiled or the number of prototype
-  // checks otherwise.
-  int GetPrototypeCheckCount(Handle<Map> receiver_map, Handle<JSObject> holder);
-
   // Creates a data handler that represents a prototype chain check followed
   // by given Smi-handler that encoded a load from the holder.
   // Can be used only if GetPrototypeCheckCount() returns non negative value.
@@ -425,6 +417,10 @@ class StoreIC : public IC {
                                 CacheHolderFlag cache_holder) override;
 
  private:
+  Handle<Object> StoreTransition(Handle<Map> receiver_map,
+                                 Handle<JSObject> holder,
+                                 Handle<Map> transition, Handle<Name> name);
+
   friend class IC;
 };