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

components/sync/driver/sync_service.h

 // Copyright 2015 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_DRIVER_SYNC_SERVICE_H_
 #define COMPONENTS_SYNC_DRIVER_SYNC_SERVICE_H_
 
 #include <memory>
 #include <string>
 
@@ skipping 11 matching lines @@
 class GoogleServiceAuthError;
 
 namespace browser_sync {
 class ProtocolEventObserver;
 }
 
 namespace syncer {
 
 class BaseTransaction;
 class JsController;
+class SyncCycleSnapshot;
 class TypeDebugInfoObserver;
 struct SyncStatus;
 struct UserShare;
 
-namespace sessions {
-class SyncSessionSnapshot;
-}  // namespace sessions
-
 }  // namespace syncer
 
 namespace sync_driver {
 
 class DataTypeController;
 class LocalDeviceInfoProvider;
 class OpenTabsUIDelegate;
 class SyncClient;
 
 // UIs that need to prevent Sync startup should hold an instance of this class
@@ skipping 238 matching lines @@
   // Returns false if the backend was not available for querying; in that case
   // the struct will be filled with default data.
   virtual bool QueryDetailedSyncStatus(syncer::SyncStatus* result) = 0;
 
   // Returns a user-friendly string form of last synced time (in minutes).
   virtual base::string16 GetLastSyncedTimeString() const = 0;
 
   // Returns a human readable string describing backend initialization state.
   virtual std::string GetBackendInitializationStateString() const = 0;
 
-  virtual syncer::sessions::SyncSessionSnapshot GetLastSessionSnapshot()
-      const = 0;
+  virtual syncer::SyncCycleSnapshot GetLastCycleSnapshot() const = 0;
 
   // Returns a ListValue indicating the status of all registered types.
   //
   // The format is:
   // [ {"name": <name>, "value": <value>, "status": <status> }, ... ]
   // where <name> is a type's name, <value> is a string providing details for
   // the type's status, and <status> is one of "error", "warning" or "ok"
   // depending on the type's current status.
   //
   // This function is used by about_sync_util.cc to help populate the about:sync
@@ skipping 32 matching lines @@
  protected:
   SyncService() {}
 
  private:
   DISALLOW_COPY_AND_ASSIGN(SyncService);
 };
 
 }  // namespace sync_driver
 
 #endif  // COMPONENTS_SYNC_DRIVER_SYNC_SERVICE_H_