Remove most occurences of PrefRegistrySyncable::UNSYNCABLE_PREF

chrome/browser/prefs/tracked/dictionary_hash_store_contents.cc

Index: chrome/browser/prefs/tracked/dictionary_hash_store_contents.cc
diff --git a/chrome/browser/prefs/tracked/dictionary_hash_store_contents.cc b/chrome/browser/prefs/tracked/dictionary_hash_store_contents.cc
index 7b6f542ea1c1869273ef29daa6e143f889332ca5..567b9c8121c0ebb175544672b694a4ffbcf1db5b 100644
--- a/chrome/browser/prefs/tracked/dictionary_hash_store_contents.cc
+++ b/chrome/browser/prefs/tracked/dictionary_hash_store_contents.cc
@@ -55,13 +55,8 @@ DictionaryHashStoreContents::DictionaryHashStoreContents(
 // static
 void DictionaryHashStoreContents::RegisterProfilePrefs(
     user_prefs::PrefRegistrySyncable* registry) {
-  registry->RegisterDictionaryPref(
-      kPreferenceMACs,
-      user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
-  registry->RegisterStringPref(
-      kSuperMACPref,
-      std::string(),
-      user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
+  registry->RegisterDictionaryPref(kPreferenceMACs);
+  registry->RegisterStringPref(kSuperMACPref, std::string());
 }
 
 std::string DictionaryHashStoreContents::hash_store_id() const {