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

components/sync/driver/glue/sync_backend_host_impl.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_impl.h"
 
 #include <map>
 #include <utility>
 #include <vector>
 
@@ skipping 428 matching lines @@
 
 syncer::UserShare* SyncBackendHostImpl::GetUserShare() const {
   return core_->sync_manager()->GetUserShare();
 }
 
 SyncBackendHostImpl::Status SyncBackendHostImpl::GetDetailedStatus() {
   DCHECK(initialized());
   return core_->sync_manager()->GetDetailedStatus();
 }
 
-syncer::sessions::SyncSessionSnapshot
-SyncBackendHostImpl::GetLastSessionSnapshot() const {
+syncer::SyncCycleSnapshot SyncBackendHostImpl::GetLastCycleSnapshot() const {
   return last_snapshot_;
 }
 
 bool SyncBackendHostImpl::HasUnsyncedItems() const {
   DCHECK(initialized());
   return core_->sync_manager()->HasUnsyncedItems();
 }
 
 bool SyncBackendHostImpl::IsNigoriEnabled() const {
   return registrar_.get() && registrar_->IsNigoriEnabled();
@@ skipping 159 matching lines @@
   DCHECK(frontend_task_runner_->BelongsToCurrentThread());
   if (!frontend_)
     return;
 
   frontend_->OnBackendInitialized(
       syncer::WeakHandle<syncer::JsBackend>(),
       syncer::WeakHandle<syncer::DataTypeDebugInfoListener>(), "", false);
 }
 
 void SyncBackendHostImpl::HandleSyncCycleCompletedOnFrontendLoop(
-    const syncer::sessions::SyncSessionSnapshot& snapshot) {
+    const syncer::SyncCycleSnapshot& snapshot) {
   if (!frontend_)
     return;
   DCHECK(frontend_task_runner_->BelongsToCurrentThread());
 
   last_snapshot_ = snapshot;
 
   SDVLOG(1) << "Got snapshot " << snapshot.ToString();
 
   if (!snapshot.poll_finish_time().is_null())
     sync_prefs_->SetLastPollTime(snapshot.poll_finish_time());
@@ skipping 209 matching lines @@
     const syncer::SyncManager::ClearServerDataCallback& frontend_callback) {
   DCHECK(ui_thread_->BelongsToCurrentThread());
   frontend_callback.Run();
 }
 
 }  // namespace browser_sync
 
 #undef SDVLOG
 
 #undef SLOG