Remove most occurences of PrefRegistrySyncable::UNSYNCABLE_PREF

chrome/browser/media/media_device_id_salt.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 #include "chrome/browser/media/media_device_id_salt.h"
 
 #include "base/base64.h"
 #include "base/prefs/pref_service.h"
 #include "base/rand_util.h"
 #include "chrome/browser/profiles/profile_io_data.h"
 #include "chrome/common/pref_names.h"
@@ skipping 40 matching lines @@
 
 std::string MediaDeviceIDSalt::GetSalt() const {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
   if (incognito_salt_.size())
     return incognito_salt_;
   return media_device_id_salt_.GetValue();
 }
 
 void MediaDeviceIDSalt::RegisterProfilePrefs(
     user_prefs::PrefRegistrySyncable* registry) {
-  registry->RegisterStringPref(
-      prefs::kMediaDeviceIdSalt,
-      std::string(),
-      user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
+  registry->RegisterStringPref(prefs::kMediaDeviceIdSalt, std::string());
 }
 
 void MediaDeviceIDSalt::Reset(PrefService* pref_service) {
   pref_service->SetString(prefs::kMediaDeviceIdSalt,
                           CreateSalt());
 }