[Sync] Move snapshot cache from SBHI to PSS.

components/sync/engine/sync_engine_host_stub.cc

 // 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.
 
 #include "components/sync/engine/sync_engine_host_stub.h"
 
 namespace syncer {
 
 SyncEngineHostStub::SyncEngineHostStub() = default;
 SyncEngineHostStub::~SyncEngineHostStub() = default;
 
 void SyncEngineHostStub::OnEngineInitialized(
     ModelTypeSet initial_types,
     const WeakHandle<JsBackend>& js_backend,
     const WeakHandle<DataTypeDebugInfoListener>& debug_info_listener,
     const std::string& cache_guid,
     bool success) {}
 
-void SyncEngineHostStub::OnSyncCycleCompleted() {}
+void SyncEngineHostStub::OnSyncCycleCompleted(
+    const SyncCycleSnapshot& snapshot) {}
 
 void SyncEngineHostStub::OnProtocolEvent(const ProtocolEvent& event) {}
 
 void SyncEngineHostStub::OnDirectoryTypeCommitCounterUpdated(
     ModelType type,
     const CommitCounters& counters) {}
 
 void SyncEngineHostStub::OnDirectoryTypeUpdateCounterUpdated(
     ModelType type,
     const UpdateCounters& counters) {}
@@ skipping 18 matching lines @@
 void SyncEngineHostStub::OnMigrationNeededForTypes(ModelTypeSet types) {}
 
 void SyncEngineHostStub::OnExperimentsChanged(const Experiments& experiments) {}
 
 void SyncEngineHostStub::OnActionableError(const SyncProtocolError& error) {}
 
 void SyncEngineHostStub::OnLocalSetPassphraseEncryption(
     const SyncEncryptionHandler::NigoriState& nigori_state) {}
 
 }  // namespace syncer