Refactor preference syncing.

chrome/browser/extensions/apps_promo.cc

 // Copyright (c) 2011 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/extensions/apps_promo.h"
 
 #include "base/command_line.h"
 #include "base/metrics/histogram.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/prefs/pref_service.h"
@@ skipping 11 matching lines @@
   local_state->RegisterStringPref(prefs::kNTPWebStorePromoHeader, empty);
   local_state->RegisterStringPref(prefs::kNTPWebStorePromoButton, empty);
   local_state->RegisterStringPref(prefs::kNTPWebStorePromoLink, empty);
   local_state->RegisterStringPref(prefs::kNTPWebStorePromoExpire, empty);
 }
 
 // static
 void AppsPromo::RegisterUserPrefs(PrefService* prefs) {
   // Set the default value for the counter to max+1 since we don't install
   // default apps for new users.
-  prefs->RegisterIntegerPref(
-      prefs::kAppsPromoCounter, kDefaultAppsCounterMax + 1);
-  prefs->RegisterBooleanPref(prefs::kDefaultAppsInstalled, false);
-  prefs->RegisterStringPref(prefs::kNTPWebStorePromoLastId, std::string());
+  prefs->RegisterIntegerPref(prefs::kAppsPromoCounter,
+                             kDefaultAppsCounterMax + 1,
+                             PrefService::UNSYNCABLE_PREF);
+  prefs->RegisterBooleanPref(prefs::kDefaultAppsInstalled,
+                             false,
+                             PrefService::UNSYNCABLE_PREF);
+  prefs->RegisterStringPref(prefs::kNTPWebStorePromoLastId,
+                            std::string(),
+                            PrefService::UNSYNCABLE_PREF);
 }
 
 // static
 void AppsPromo::ClearPromo() {
   PrefService* local_state = g_browser_process->local_state();
   local_state->ClearPref(prefs::kNTPWebStorePromoId);
   local_state->ClearPref(prefs::kNTPWebStorePromoHeader);
   local_state->ClearPref(prefs::kNTPWebStorePromoButton);
   local_state->ClearPref(prefs::kNTPWebStorePromoLink);
   local_state->ClearPref(prefs::kNTPWebStorePromoExpire);
@@ skipping 166 matching lines @@
 }
 
 void AppsPromo::SetPromoCounter(int val) {
   prefs_->SetInteger(prefs::kAppsPromoCounter, val);
   prefs_->ScheduleSavePersistentPrefs();
 }
 
 bool AppsPromo::GetDefaultAppsInstalled() const {
   return prefs_->GetBoolean(prefs::kDefaultAppsInstalled);
 }