Unify implementations of Map handles vectors and lists

src/objects.cc

Index: src/objects.cc
diff --git a/src/objects.cc b/src/objects.cc
index 28d936f655e1ce3b10dcf19ba1ab0702b1ec8f40..b6847fa814aff9f0842399c2f8959decdece3464 100644
--- a/src/objects.cc
+++ b/src/objects.cc
@@ -4832,16 +4832,15 @@ int AccessorInfo::AppendUnique(Handle<Object> descriptors,
                                                    valid_descriptors);
 }
 
-
-static bool ContainsMap(MapHandleList* maps, Map* map) {
+static bool ContainsMap(MapHandles const& maps, Map* map) {
   DCHECK_NOT_NULL(map);
-  for (int i = 0; i < maps->length(); ++i) {
-    if (!maps->at(i).is_null() && *maps->at(i) == map) return true;
+  for (Handle<Map> current : maps) {
+    if (!current.is_null() && *current == map) return true;
   }
   return false;
 }
 
-Map* Map::FindElementsKindTransitionedMap(MapHandleList* candidates) {
+Map* Map::FindElementsKindTransitionedMap(MapHandles const& candidates) {
   DisallowHeapAllocation no_allocation;
   DisallowDeoptimization no_deoptimization(GetIsolate());