Make SyncBackendRegistrar aware of loaded data

sync/internal_api/sync_manager_impl.h

 // 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.
 
 #ifndef SYNC_INTERNAL_API_SYNC_MANAGER_H_
 #define SYNC_INTERNAL_API_SYNC_MANAGER_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 47 matching lines @@
 
   // SyncManager implementation.
   virtual bool Init(
       const FilePath& database_location,
       const WeakHandle<JsEventHandler>& event_handler,
       const std::string& sync_server_and_path,
       int sync_server_port,
       bool use_ssl,
       const scoped_refptr<base::TaskRunner>& blocking_task_runner,
       scoped_ptr<HttpPostProviderFactory> post_factory,
-      const ModelSafeRoutingInfo& model_safe_routing_info,
       const std::vector<ModelSafeWorker*>& workers,
       ExtensionsActivityMonitor* extensions_activity_monitor,
       SyncManager::ChangeDelegate* change_delegate,
       const SyncCredentials& credentials,
       scoped_ptr<SyncNotifier> sync_notifier,
       const std::string& restored_key_for_bootstrapping,
       scoped_ptr<InternalComponentsFactory> internal_components_factory,
       Encryptor* encryptor,
       UnrecoverableErrorHandler* unrecoverable_error_handler,
       ReportUnrecoverableErrorFunction
@@ skipping 135 matching lines @@
   // value of false means that it should be OK to ignore this change.
   bool VisiblePropertiesDiffer(
       const syncable::EntryKernelMutation& mutation,
       Cryptographer* cryptographer) const;
 
   bool ChangeBuffersAreEmpty();
 
   // Open the directory named with username_for_share
   bool OpenDirectory();
 
-  // Sign into sync with given credentials.
-  // We do not verify the tokens given. After this call, the tokens are set
-  // and the sync DB is open. True if successful, false if something
-  // went wrong.
-  bool SignIn(const SyncCredentials& credentials);
+  // Purge those types from |previously_enabled_types| that are no longer
+  // enabled in |currently_enabled_types|.
+  bool PurgeDisabledTypes(ModelTypeSet previously_enabled_types,
+                          ModelTypeSet currently_enabled_types);
 
   void RequestNudgeForDataTypes(
       const tracked_objects::Location& nudge_location,
       ModelTypeSet type);
 
   void NotifyCryptographerState(Cryptographer* cryptographer);
 
   // If this is a deletion for a password, sets the legacy
   // ExtraPasswordChangeRecordData field of |buffer|. Otherwise sets
   // |buffer|'s specifics field to contain the unencrypted data.
@@ skipping 162 matching lines @@
   // conflict resolver) updated the nigori's encryption keys in this chrome
   // instantiation.
   int nigori_overwrite_count_;
 
   DISALLOW_COPY_AND_ASSIGN(SyncManagerImpl);
 };
 
 }  // namespace syncer
 
 #endif  // SYNC_INTERNAL_API_SYNC_MANAGER_H_