Add PrefStore::GetValues

components/user_prefs/tracked/segregated_pref_store.h

Index: components/user_prefs/tracked/segregated_pref_store.h
diff --git a/components/user_prefs/tracked/segregated_pref_store.h b/components/user_prefs/tracked/segregated_pref_store.h
index 016cca6d0490de2de4a5ce4ff08063eec6fe38ba..40629768f018e35018313d7e5a3966503e0a0f3f 100644
--- a/components/user_prefs/tracked/segregated_pref_store.h
+++ b/components/user_prefs/tracked/segregated_pref_store.h
@@ -52,6 +52,7 @@ class SegregatedPrefStore : public PersistentPrefStore {
   bool IsInitializationComplete() const override;
   bool GetValue(const std::string& key,
                 const base::Value** result) const override;
+  std::unique_ptr<base::DictionaryValue> GetValues() const override;
 
   // WriteablePrefStore implementation
   void SetValue(const std::string& key,