sync: Expose sync functionality as functions

sync/sessions/sync_session.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.
 
 // A class representing an attempt to synchronize the local syncable data
 // store with a sync server. A SyncSession instance is passed as a stateful
 // bundle to and from various SyncerCommands with the goal of converging the
 // client view of data with that of the server. The commands twiddle with
 // session status in response to events and hiccups along the way, set and
 // query session progress with regards to conflict resolution and applying
@@ skipping 83 matching lines @@
         const sessions::SyncSessionSnapshot& snapshot) = 0;
 
     // Called when the server wants to change the number of hints the client
     // will buffer locally.
     virtual void OnReceivedClientInvalidationHintBufferSize(int size) = 0;
 
    protected:
     virtual ~Delegate() {}
   };
 
-  // Build a session with a nudge tracker.  Used for sync cycles with origin of
-  // GU_TRIGGER (ie. notification, local change, and/or refresh request)
-  static SyncSession* BuildForNudge(SyncSessionContext* context,
-                                    Delegate* delegate,
-                                    const SyncSourceInfo& source,
-                                    const NudgeTracker* nudge_tracker);
-
   // Build a session without a nudge tracker.  Used for poll or configure type
   // sync cycles.
   static SyncSession* Build(SyncSessionContext* context,
                             Delegate* delegate,
                             const SyncSourceInfo& source);
-
   ~SyncSession();
 
   // Builds a thread-safe and read-only copy of the current session state.
   SyncSessionSnapshot TakeSnapshot() const;
 
   // Builds and sends a snapshot to the session context's listeners.
   void SendEventNotification(SyncEngineEvent::EventCause cause);
 
   // TODO(akalin): Split this into context() and mutable_context().
   SyncSessionContext* context() const { return context_; }
   Delegate* delegate() const { return delegate_; }
   const StatusController& status_controller() const {
     return *status_controller_.get();
   }
   StatusController* mutable_status_controller() {
     return status_controller_.get();
   }
 
   const SyncSourceInfo& source() const { return source_; }
 
-  const NudgeTracker* nudge_tracker() const { return nudge_tracker_; }
-
  private:
   SyncSession(SyncSessionContext* context,
               Delegate* delegate,
-              const SyncSourceInfo& source,
-              const NudgeTracker* nudge_tracker);
+              const SyncSourceInfo& source);
 
   // The context for this session, guaranteed to outlive |this|.
   SyncSessionContext* const context_;
 
   // The source for initiating this sync session.
   SyncSourceInfo source_;
 
   // The delegate for this session, must never be NULL.
   Delegate* const delegate_;
 
   // Our controller for various status and error counters.
   scoped_ptr<StatusController> status_controller_;
 
-  const NudgeTracker* nudge_tracker_;
-
   DISALLOW_COPY_AND_ASSIGN(SyncSession);
 };
 
 }  // namespace sessions
 }  // namespace syncer
 
 #endif  // SYNC_SESSIONS_SYNC_SESSION_H_