Correct const accessors in base/values.(h|cc), Part II (ListValue)

chrome/browser/sync/invalidations/invalidator_storage.cc

Index: chrome/browser/sync/invalidations/invalidator_storage.cc
diff --git a/chrome/browser/sync/invalidations/invalidator_storage.cc b/chrome/browser/sync/invalidations/invalidator_storage.cc
index 3546d9cd7f1a9e9b4991cb7684a68705191bc91c..5e2f8617871237bddcfef0edcbe6c561df749953 100644
--- a/chrome/browser/sync/invalidations/invalidator_storage.cc
+++ b/chrome/browser/sync/invalidations/invalidator_storage.cc
@@ -122,7 +122,7 @@ void InvalidatorStorage::DeserializeFromList(
     InvalidationVersionMap* max_versions_map) {
   max_versions_map->clear();
   for (size_t i = 0; i < max_versions_list.GetSize(); ++i) {
-    DictionaryValue* value = NULL;
+    const DictionaryValue* value = NULL;
     if (!max_versions_list.GetDictionary(i, &value)) {
       DLOG(WARNING) << "Unable to deserialize entry " << i;
       continue;