sync: Add interfaces for per-type sync

sync/engine/get_updates_processor.h

 // Copyright 2014 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 SYNC_ENGINE_GET_UPDATES_PROCESSOR_H
 #define SYNC_ENGINE_GET_UPDATES_PROCESSOR_H
 
 #include <map>
 #include <vector>
 
@@ skipping 12 matching lines @@
 
 namespace sessions {
 class StatusController;
 }  // namespace sessions
 
 namespace syncable {
 class Directory;
 }  // namespace syncable
 
 class GetUpdatesDelegate;
-class SyncDirectoryUpdateHandler;
-
-typedef std::vector<const sync_pb::SyncEntity*> SyncEntityList;
-typedef std::map<ModelType, SyncEntityList> TypeSyncEntityMap;
 
 // This class manages the set of per-type syncer objects.
 //
 // It owns these types and hides the details of iterating over all of them.
 // Most methods allow the caller to specify a subset of types on which the
 // operation is to be applied.  It is a logic error if the supplied set of types
 // contains a type which was not previously registered with the manager.
 class SYNC_EXPORT_PRIVATE GetUpdatesProcessor {
  public:
   explicit GetUpdatesProcessor(UpdateHandlerMap* update_handler_map,
@@ skipping 20 matching lines @@
   UpdateHandlerMap* update_handler_map_;
 
   const GetUpdatesDelegate& delegate_;
 
   DISALLOW_COPY_AND_ASSIGN(GetUpdatesProcessor);
 };
 
 }  // namespace syncer
 
 #endif  // SYNC_ENGINE_GET_UPDATES_PROCESSOR_H_