[Sync] Move sessions/ to engine/cycle/ and rename things to match.

components/sync/driver/glue/sync_backend_host_mock.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/driver/glue/sync_backend_host_mock.h"
 
 #include "components/sync/core/activation_context.h"
 #include "components/sync/driver/sync_frontend.h"
 
 namespace browser_sync {
@@ skipping 75 matching lines @@
     syncer::ModelType type) {}
 
 syncer::UserShare* SyncBackendHostMock::GetUserShare() const {
   return NULL;
 }
 
 SyncBackendHost::Status SyncBackendHostMock::GetDetailedStatus() {
   return SyncBackendHost::Status();
 }
 
-syncer::sessions::SyncSessionSnapshot
-SyncBackendHostMock::GetLastSessionSnapshot() const {
-  return syncer::sessions::SyncSessionSnapshot();
+syncer::SyncCycleSnapshot SyncBackendHostMock::GetLastCycleSnapshot() const {
+  return syncer::SyncCycleSnapshot();
 }
 
 bool SyncBackendHostMock::HasUnsyncedItems() const {
   return false;
 }
 
 bool SyncBackendHostMock::IsNigoriEnabled() const {
   return true;
 }
 
@@ skipping 40 matching lines @@
 
 void SyncBackendHostMock::ClearServerData(
     const syncer::SyncManager::ClearServerDataCallback& callback) {
   callback.Run();
 }
 
 void SyncBackendHostMock::OnCookieJarChanged(bool account_mismatch,
                                              bool empty_jar) {}
 
 }  // namespace browser_sync