[Policy Experimental] Add "recommended" policies for URL exceptions.

components/prefs/pref_value_store.cc

Index: components/prefs/pref_value_store.cc
diff --git a/components/prefs/pref_value_store.cc b/components/prefs/pref_value_store.cc
index 4c7a4e5d9cf65007e4f1af49dbd6cc51316f9ca5..9799dda5e74276fdb64a8cc22c5c06d55e31fee3 100644
--- a/components/prefs/pref_value_store.cc
+++ b/components/prefs/pref_value_store.cc
@@ -118,6 +118,12 @@ bool PrefValueStore::GetValue(const std::string& name,
   return false;
 }
 
+bool PrefValueStore::GetManagedValue(const std::string& name,
+                                     base::Value::Type type,
+                                     const base::Value** out_value) const {
+  return GetValueFromStoreWithType(name, type, MANAGED_STORE, out_value);
+}
+
 bool PrefValueStore::GetRecommendedValue(const std::string& name,
                                          base::Value::Type type,
                                          const base::Value** out_value) const {