[Sync] Add ability to save/restore Nigori to SyncEncryptionHandlerImpl

sync/sessions/model_type_registry.h

 // 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.
 
 #ifndef SYNC_ENGINE_MODEL_TYPE_REGISTRY_H_
 #define SYNC_ENGINE_MODEL_TYPE_REGISTRY_H_
 
 #include <map>
 
 #include "base/basictypes.h"
@@ skipping 65 matching lines @@
       const sync_pb::EncryptedData& pending_keys) override;
   void OnPassphraseAccepted() override;
   void OnBootstrapTokenUpdated(const std::string& bootstrap_token,
                                BootstrapTokenType type) override;
   void OnEncryptedTypesChanged(ModelTypeSet encrypted_types,
                                bool encrypt_everything) override;
   void OnEncryptionComplete() override;
   void OnCryptographerStateChanged(Cryptographer* cryptographer) override;
   void OnPassphraseTypeChanged(PassphraseType type,
                                base::Time passphrase_time) override;
+  void OnLocalSetPassphraseEncryption(
+      const SyncEncryptionHandler::NigoriState& nigori_state) override;
 
   // Gets the set of enabled types.
   ModelTypeSet GetEnabledTypes() const;
 
   // Simple getters.
   UpdateHandlerMap* update_handler_map();
   CommitContributorMap* commit_contributor_map();
   DirectoryTypeDebugInfoEmitterMap* directory_type_debug_info_emitter_map();
 
   void RegisterDirectoryTypeDebugInfoObserver(
@@ skipping 57 matching lines @@
   base::ObserverList<TypeDebugInfoObserver> type_debug_info_observers_;
 
   base::WeakPtrFactory<ModelTypeRegistry> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ModelTypeRegistry);
 };
 
 }  // namespace syncer
 
 #endif // SYNC_ENGINE_MODEL_TYPE_REGISTRY_H_