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

chrome/browser/sync/glue/sync_backend_host_core.h

 // Copyright 2013 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 CHROME_BROWSER_SYNC_GLUE_SYNC_BACKEND_HOST_CORE_H_
 #define CHROME_BROWSER_SYNC_GLUE_SYNC_BACKEND_HOST_CORE_H_
 
 #include "base/memory/ref_counted.h"
 
 #include "base/timer/timer.h"
@@ skipping 97 matching lines @@
   void OnPassphraseAccepted() override;
   void OnBootstrapTokenUpdated(const std::string& bootstrap_token,
                                syncer::BootstrapTokenType type) override;
   void OnEncryptedTypesChanged(syncer::ModelTypeSet encrypted_types,
                                bool encrypt_everything) override;
   void OnEncryptionComplete() override;
   void OnCryptographerStateChanged(
       syncer::Cryptographer* cryptographer) override;
   void OnPassphraseTypeChanged(syncer::PassphraseType type,
                                base::Time passphrase_time) override;
+  void OnLocalSetCustomPassphrase(
+      const syncer::SyncEncryptionHandler::NigoriState& nigori_state) override;
 
   // TypeDebugInfoObserver implementation
   void OnCommitCountersUpdated(syncer::ModelType type,
                                const syncer::CommitCounters& counters) override;
   void OnUpdateCountersUpdated(syncer::ModelType type,
                                const syncer::UpdateCounters& counters) override;
   void OnStatusCountersUpdated(syncer::ModelType type,
                                const syncer::StatusCounters& counters) override;
 
   // Forwards an invalidation state change to the sync manager.
@@ skipping 171 matching lines @@
   bool forward_type_info_;
 
   base::WeakPtrFactory<SyncBackendHostCore> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(SyncBackendHostCore);
 };
 
 }  // namespace browser_sync
 
 #endif  // CHROME_BROWSER_SYNC_GLUE_SYNC_BACKEND_HOST_CORE_H_