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

components/sync/core_impl/sync_manager_impl.h

 // Copyright 2012 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_CORE_IMPL_SYNC_MANAGER_IMPL_H_
 #define COMPONENTS_SYNC_CORE_IMPL_SYNC_MANAGER_IMPL_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 20 matching lines @@
 #include "components/sync/js/js_backend.h"
 #include "components/sync/syncable/directory_change_delegate.h"
 #include "net/base/network_change_notifier.h"
 
 class GURL;
 
 namespace syncer {
 
 class ModelTypeRegistry;
 class SyncAPIServerConnectionManager;
+class SyncCycleContext;
 class TypeDebugInfoObserver;
 class WriteNode;
 class WriteTransaction;
 
-namespace sessions {
-class SyncSessionContext;
-}
-
 // SyncManager encapsulates syncable::Directory and serves as the parent of all
 // other objects in the sync API.  If multiple threads interact with the same
 // local sync repository (i.e. the same sqlite database), they should share a
 // single SyncManager instance.  The caller should typically create one
 // SyncManager for the lifetime of a user session.
 //
 // Unless stated otherwise, all methods of SyncManager should be called on the
 // same thread.
 class SyncManagerImpl
     : public SyncManager,
@@ skipping 223 matching lines @@
 
   // The ServerConnectionManager used to abstract communication between the
   // client (the Syncer) and the sync server.
   std::unique_ptr<SyncAPIServerConnectionManager> connection_manager_;
 
   // Maintains state that affects the way we interact with different sync types.
   // This state changes when entering or exiting a configuration cycle.
   std::unique_ptr<ModelTypeRegistry> model_type_registry_;
 
   // A container of various bits of information used by the SyncScheduler to
-  // create SyncSessions.  Must outlive the SyncScheduler.
-  std::unique_ptr<sessions::SyncSessionContext> session_context_;
+  // create SyncCycles.  Must outlive the SyncScheduler.
+  std::unique_ptr<SyncCycleContext> cycle_context_;
 
   // The scheduler that runs the Syncer. Needs to be explicitly
   // Start()ed.
   std::unique_ptr<SyncScheduler> scheduler_;
 
   // A multi-purpose status watch object that aggregates stats from various
   // sync components.
   AllStatus allstatus_;
 
   // Each element of this map is a store of change records produced by
@@ skipping 34 matching lines @@
   std::unique_ptr<SyncEncryptionHandlerImpl> sync_encryption_handler_;
 
   base::WeakPtrFactory<SyncManagerImpl> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(SyncManagerImpl);
 };
 
 }  // namespace syncer
 
 #endif  // COMPONENTS_SYNC_CORE_IMPL_SYNC_MANAGER_IMPL_H_