Cache IC handlers on the prototype's map if possible

src/property.h

Index: src/property.h
diff --git a/src/property.h b/src/property.h
index 2c05188359b9f4c3fd1cb335457153bd8e1c8e9a..191b45789fbec659d2f687612d50b2c93a069de2 100644
--- a/src/property.h
+++ b/src/property.h
@@ -460,6 +460,12 @@ class LookupResult V8_FINAL BASE_EMBEDDED {
     return map->FindFieldOwner(number_);
   }
 
+  bool ReceiverIsHolder(Handle<Object> receiver) {
+    if (*receiver == holder()) return true;
+    if (lookup_type_ == TRANSITION_TYPE) return true;
+    return false;
+  }
+
   void Iterate(ObjectVisitor* visitor);
 
  private: