[Sync] Move snapshot cache from SBHI to PSS.

components/sync/engine/fake_sync_engine.cc

 // 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.
 
 #include "components/sync/engine/fake_sync_engine.h"
 
 #include "components/sync/engine/activation_context.h"
 #include "components/sync/engine/sync_engine_host.h"
 
 namespace syncer {
@@ skipping 43 matching lines @@
 void FakeSyncEngine::DeactivateNonBlockingDataType(ModelType type) {}
 
 UserShare* FakeSyncEngine::GetUserShare() const {
   return nullptr;
 }
 
 SyncEngine::Status FakeSyncEngine::GetDetailedStatus() {
   return SyncEngine::Status();
 }
 
-SyncCycleSnapshot FakeSyncEngine::GetLastCycleSnapshot() const {
-  return SyncCycleSnapshot();
-}
-
 bool FakeSyncEngine::HasUnsyncedItems() const {
   return false;
 }
 
 bool FakeSyncEngine::IsNigoriEnabled() const {
   return true;
 }
 
 PassphraseType FakeSyncEngine::GetPassphraseType() const {
   return PassphraseType::IMPLICIT_PASSPHRASE;
@@ skipping 27 matching lines @@
 
 void FakeSyncEngine::ClearServerData(
     const SyncManager::ClearServerDataCallback& callback) {
   callback.Run();
 }
 
 void FakeSyncEngine::OnCookieJarChanged(bool account_mismatch, bool empty_jar) {
 }
 
 }  // namespace syncer