Remove most occurences of PrefRegistrySyncable::UNSYNCABLE_PREF

chrome/browser/net/net_pref_observer.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/net/net_pref_observer.h"
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/prefs/pref_service.h"
 #include "chrome/common/pref_names.h"
@@ skipping 25 matching lines @@
     net::HttpStreamFactory::set_spdy_enabled(!*spdy_disabled_);
 }
 
 // static
 void NetPrefObserver::RegisterProfilePrefs(
     user_prefs::PrefRegistrySyncable* registry) {
   registry->RegisterBooleanPref(
       prefs::kNetworkPredictionEnabled,
       true,
       user_prefs::PrefRegistrySyncable::SYNCABLE_PREF);
-  registry->RegisterBooleanPref(
-      prefs::kDisableSpdy,
-      false,
-      user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
+  registry->RegisterBooleanPref(prefs::kDisableSpdy, false);
 }