[invalidation] Componentize TiclProfileSettingsProvider

components/invalidation/impl/profile_invalidation_provider.cc

 // Copyright 2014 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 "components/invalidation/impl/profile_invalidation_provider.h"
 
+#include "components/invalidation/impl/invalidation_prefs.h"
 #include "components/invalidation/public/invalidation_service.h"
+#include "components/pref_registry/pref_registry_syncable.h"
 
 namespace invalidation {
 
 ProfileInvalidationProvider::ProfileInvalidationProvider(
     scoped_ptr<InvalidationService> invalidation_service)
     : invalidation_service_(invalidation_service.Pass()) {
 }
 
 ProfileInvalidationProvider::~ProfileInvalidationProvider() {
 }
 
 InvalidationService* ProfileInvalidationProvider::GetInvalidationService() {
   return invalidation_service_.get();
 }
 
 void ProfileInvalidationProvider::Shutdown() {
   invalidation_service_.reset();
 }
 
+// static
+void ProfileInvalidationProvider::RegisterProfilePrefs(
+    user_prefs::PrefRegistrySyncable* registry) {
+  registry->RegisterBooleanPref(
+      prefs::kInvalidationServiceUseGCMChannel,
+      true);  // if no value in prefs, use GCM channel.
+}
+
 }  // namespace invalidation