[Sync] Split encryption state and logic out of PSS and SBHI.

components/sync/engine/sync_engine_host_stub.h

 // Copyright 2016 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 COMPONENTS_SYNC_ENGINE_SYNC_ENGINE_HOST_STUB_H_
 #define COMPONENTS_SYNC_ENGINE_SYNC_ENGINE_HOST_STUB_H_
 
 #include <string>
 
 #include "components/sync/engine/sync_engine_host.h"
@@ skipping 16 matching lines @@
   void OnProtocolEvent(const ProtocolEvent& event) override;
   void OnDirectoryTypeCommitCounterUpdated(
       ModelType type,
       const CommitCounters& counters) override;
   void OnDirectoryTypeUpdateCounterUpdated(
       ModelType type,
       const UpdateCounters& counters) override;
   void OnDatatypeStatusCounterUpdated(ModelType type,
                                       const StatusCounters& counters) override;
   void OnConnectionStatusChange(ConnectionStatus status) override;
-  void OnPassphraseRequired(
-      PassphraseRequiredReason reason,
-      const sync_pb::EncryptedData& pending_keys) override;
-  void OnPassphraseAccepted() override;
-  void OnEncryptedTypesChanged(ModelTypeSet encrypted_types,
-                               bool encrypt_everything) override;
-  void OnEncryptionComplete() override;
   void OnMigrationNeededForTypes(ModelTypeSet types) override;
   void OnExperimentsChanged(const Experiments& experiments) override;
   void OnActionableError(const SyncProtocolError& error) override;
-  void OnLocalSetPassphraseEncryption(
-      const SyncEncryptionHandler::NigoriState& nigori_state) override;
 };
 
 }  // namespace syncer
 
 #endif  // COMPONENTS_SYNC_ENGINE_SYNC_ENGINE_HOST_STUB_H_