[ic] Completely unroll polymorphic IC map checks

src/ic/ic.cc

Index: src/ic/ic.cc
diff --git a/src/ic/ic.cc b/src/ic/ic.cc
index f5295b6e28256166729a540e357fb4bec1865479..586fcad3ad56b1b932d6e09ef5edc82d2b7f245e 100644
--- a/src/ic/ic.cc
+++ b/src/ic/ic.cc
@@ -771,7 +771,7 @@ bool IC::UpdatePolymorphicIC(Handle<Name> name, Handle<Object> handler) {
   int number_of_valid_maps =
       number_of_maps - deprecated_maps - (handler_to_overwrite != -1);
 
-  if (number_of_valid_maps >= 4) return false;
+  if (number_of_valid_maps >= kMaxPolymorphicMapCount) return false;
   if (number_of_maps == 0 && state() != MONOMORPHIC && state() != POLYMORPHIC) {
     return false;
   }