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

sync/internal_api/sync_manager_impl.h

 // Copyright 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 105 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 explicit_passphrase_time) override;
+  void OnLocalSetCustomPassphrase(
+      const SyncEncryptionHandler::NigoriState& nigori_state) override;
 
   // SyncEngineEventListener implementation.
   void OnSyncCycleEvent(const SyncCycleEvent& event) override;
   void OnActionableError(const SyncProtocolError& error) override;
   void OnRetryTimeChanged(base::Time retry_time) override;
   void OnThrottledTypesChanged(ModelTypeSet throttled_types) override;
   void OnMigrationRequested(ModelTypeSet types) override;
   void OnProtocolEvent(const ProtocolEvent& event) override;
 
   // ServerConnectionEventListener implementation.
@@ skipping 202 matching lines @@
   scoped_ptr<SyncEncryptionHandlerImpl> sync_encryption_handler_;
 
   base::WeakPtrFactory<SyncManagerImpl> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(SyncManagerImpl);
 };
 
 }  // namespace syncer
 
 #endif  // SYNC_INTERNAL_API_SYNC_MANAGER_H_