[Sync] Refactor non-frontend DTC to handle new API properly.

chrome/browser/sync/glue/preference_data_type_controller.cc

 // Copyright (c) 2011 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/sync/glue/preference_data_type_controller.h"
 
 #include "base/metrics/histogram.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/sync/api/syncable_service.h"
-#include "chrome/browser/sync/glue/generic_change_processor.h"
 #include "chrome/browser/sync/profile_sync_factory.h"
 
 namespace browser_sync {
 
 PreferenceDataTypeController::PreferenceDataTypeController(
     ProfileSyncFactory* profile_sync_factory,
     Profile* profile,
     ProfileSyncService* sync_service)
     : FrontendDataTypeController(profile_sync_factory,
                                  profile,
                                  sync_service) {
 }
 
 PreferenceDataTypeController::~PreferenceDataTypeController() {
 }
 
 syncable::ModelType PreferenceDataTypeController::type() const {
   return syncable::PREFERENCES;
 }
 
 void PreferenceDataTypeController::CreateSyncComponents() {
   ProfileSyncFactory::SyncComponents sync_components =
       profile_sync_factory_->CreatePreferenceSyncComponents(sync_service_,
                                                             this);
   set_model_associator(sync_components.model_associator);
-  set_change_processor(sync_components.change_processor);
+  change_processor_.reset(static_cast<GenericChangeProcessor*>(
+      sync_components.change_processor));
+}
+
+GenericChangeProcessor* PreferenceDataTypeController::change_processor() const {
+  return change_processor_.get();
 }
 
 void PreferenceDataTypeController::RecordUnrecoverableError(
     const tracked_objects::Location& from_here,
     const std::string& message) {
   UMA_HISTOGRAM_COUNTS("Sync.PreferenceRunFailures", 1);
 }
 
 void PreferenceDataTypeController::RecordAssociationTime(base::TimeDelta time) {
   UMA_HISTOGRAM_TIMES("Sync.PreferenceAssociationTime", time);
 }
 
 void PreferenceDataTypeController::RecordStartFailure(StartResult result) {
   UMA_HISTOGRAM_ENUMERATION("Sync.PreferenceStartFailures",
                             result,
                             MAX_START_RESULT);
 }
 
 }  // namespace browser_sync