Change base::Value::ListStorage to std::vector<base::Value>

components/sync_preferences/pref_model_associator.cc

Index: components/sync_preferences/pref_model_associator.cc
diff --git a/components/sync_preferences/pref_model_associator.cc b/components/sync_preferences/pref_model_associator.cc
index 7f893cf94329a78883d36b2316964597b11c8b9a..a0c3d519aa69f4ccff32c668532f11aaf15e1b7d 100644
--- a/components/sync_preferences/pref_model_associator.cc
+++ b/components/sync_preferences/pref_model_associator.cc
@@ -291,7 +291,7 @@ base::Value* PrefModelAssociator::MergeListValues(const base::Value& from_value,
   base::ListValue* result = to_list_value.DeepCopy();
 
   for (const auto& value : from_list_value) {
-    result->AppendIfNotPresent(value->CreateDeepCopy());
+    result->AppendIfNotPresent(value.CreateDeepCopy());
   }
   return result;
 }