Revert of Add PrefStore::GetValues

components/prefs/overlay_user_pref_store.cc

Index: components/prefs/overlay_user_pref_store.cc
diff --git a/components/prefs/overlay_user_pref_store.cc b/components/prefs/overlay_user_pref_store.cc
index ddc47c8f351d58320c3dc836c3208271a38b510e..2b2208ed8214408290c312125e5309689dfecaff 100644
--- a/components/prefs/overlay_user_pref_store.cc
+++ b/components/prefs/overlay_user_pref_store.cc
@@ -45,24 +45,6 @@
   if (overlay_.GetValue(key, result))
     return true;
   return underlay_->GetValue(GetUnderlayKey(key), result);
-}
-
-std::unique_ptr<base::DictionaryValue> OverlayUserPrefStore::GetValues() const {
-  auto values = underlay_->GetValues();
-  auto overlay_values = overlay_.AsDictionaryValue();
-  for (const auto& overlay_mapping : overlay_to_underlay_names_map_) {
-    const std::string& overlay_key = overlay_mapping.first;
-    const std::string& underlay_key = overlay_mapping.second;
-    std::unique_ptr<base::Value> out_value;
-    if (overlay_key != underlay_key) {
-      values->Remove(underlay_key, &out_value);
-    }
-    overlay_values->Remove(overlay_key, &out_value);
-    if (out_value) {
-      values->Set(overlay_key, std::move(out_value));
-    }
-  }
-  return values;
 }
 
 bool OverlayUserPrefStore::GetMutableValue(const std::string& key,