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 b0ad2219b674ccf9e737a414aaaa933eb0910852..d09ee34dbaeb43bcb90e1bb16feda8c671256493 100644
--- a/src/objects.cc
+++ b/src/objects.cc
@@ -4834,16 +4834,15 @@ 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());