Remove most occurences of PrefRegistrySyncable::UNSYNCABLE_PREF

chrome/browser/ui/webui/instant_ui.cc

Index: chrome/browser/ui/webui/instant_ui.cc
diff --git a/chrome/browser/ui/webui/instant_ui.cc b/chrome/browser/ui/webui/instant_ui.cc
index ef8e5512842e6b60092b9de76abad309d9835356..162ac8c5d4701cda084442a352eaf19e514e9c04 100644
--- a/chrome/browser/ui/webui/instant_ui.cc
+++ b/chrome/browser/ui/webui/instant_ui.cc
@@ -172,8 +172,6 @@ InstantUI::InstantUI(content::WebUI* web_ui) : WebUIController(web_ui) {
 // static
 void InstantUI::RegisterProfilePrefs(
     user_prefs::PrefRegistrySyncable* registry) {
-  registry->RegisterStringPref(
-      prefs::kInstantUIZeroSuggestUrlPrefix,
-      std::string(),
-      user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
+  registry->RegisterStringPref(prefs::kInstantUIZeroSuggestUrlPrefix,
+                               std::string());
 }