Remove most occurences of PrefRegistrySyncable::UNSYNCABLE_PREF

chrome/browser/ui/webui/instant_ui.cc

 // Copyright (c) 2012 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/ui/webui/instant_ui.h"
 
 #include "base/bind.h"
 #include "base/prefs/pref_service.h"
 #include "base/strings/stringprintf.h"
 #include "base/time/time.h"
@@ skipping 154 matching lines @@
   web_ui->AddMessageHandler(new InstantUIMessageHandler());
 
   // Set up the chrome://instant/ source.
   Profile* profile = Profile::FromWebUI(web_ui);
   content::WebUIDataSource::Add(profile, CreateInstantHTMLSource());
 }
 
 // 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());
 }