Refactor preference syncing.

chrome/browser/extensions/apps_promo.cc

Index: chrome/browser/extensions/apps_promo.cc
diff --git a/chrome/browser/extensions/apps_promo.cc b/chrome/browser/extensions/apps_promo.cc
index ec0d9dd64f36b6066921aeffc9f826e51fd4a059..8fd4671b2f200dc6b06e62d77da6345fc8c1f9ce 100644
--- a/chrome/browser/extensions/apps_promo.cc
+++ b/chrome/browser/extensions/apps_promo.cc
@@ -18,21 +18,36 @@ const int AppsPromo::kDefaultAppsCounterMax = 10;
 // static
 void AppsPromo::RegisterPrefs(PrefService* local_state) {
   std::string empty;
-  local_state->RegisterStringPref(prefs::kNTPWebStorePromoId, empty);
-  local_state->RegisterStringPref(prefs::kNTPWebStorePromoHeader, empty);
-  local_state->RegisterStringPref(prefs::kNTPWebStorePromoButton, empty);
-  local_state->RegisterStringPref(prefs::kNTPWebStorePromoLink, empty);
-  local_state->RegisterStringPref(prefs::kNTPWebStorePromoExpire, empty);
+  local_state->RegisterStringPref(prefs::kNTPWebStorePromoId,
+                                  empty,
+                                  false /* don't sync pref */);
+  local_state->RegisterStringPref(prefs::kNTPWebStorePromoHeader,
+                                  empty,
+                                  false /* don't sync pref */);
+  local_state->RegisterStringPref(prefs::kNTPWebStorePromoButton,
+                                  empty,
+                                  false /* don't sync pref */);
+  local_state->RegisterStringPref(prefs::kNTPWebStorePromoLink,
+                                  empty,
+                                  false /* don't sync pref */);
+  local_state->RegisterStringPref(prefs::kNTPWebStorePromoExpire,
+                                  empty,
+                                  false /* don't sync pref */);
 }
 
 // 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,
+                             false /* don't sync pref */);
+  prefs->RegisterBooleanPref(prefs::kDefaultAppsInstalled,
+                             false,
+                             false /* don't sync pref */);
+  prefs->RegisterStringPref(prefs::kNTPWebStorePromoLastId,
+                            std::string(),
+                            false /* don't sync pref */);
 }
 
 // static