sync: Per-type update application

sync/engine/update_applicator.h

 // Copyright (c) 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.
 //
 // An UpdateApplicator is used to iterate over a number of unapplied updates,
 // applying them to the client using the given syncer session.
 //
 // UpdateApplicator might resemble an iterator, but it actually keeps retrying
 // failed updates until no remaining updates can be successfully applied.
 
@@ skipping 17 matching lines @@
 namespace syncable {
 class WriteTransaction;
 class Entry;
 }
 
 class ConflictResolver;
 class Cryptographer;
 
 class UpdateApplicator {
  public:
-  UpdateApplicator(Cryptographer* cryptographer,
-                   const ModelSafeRoutingInfo& routes,
-                   ModelSafeGroup group_filter);
+  UpdateApplicator(Cryptographer* cryptographer);
   ~UpdateApplicator();
 
   // Attempt to apply the specified updates.
   void AttemptApplications(syncable::WriteTransaction* trans,
                            const std::vector<int64>& handles);
 
   int updates_applied() {
     return updates_applied_;
   }
 
   int encryption_conflicts() {
     return encryption_conflicts_;
   }
 
   int hierarchy_conflicts() {
     return hierarchy_conflicts_;
   }
 
   const std::set<syncable::Id>& simple_conflict_ids() {
     return simple_conflict_ids_;
   }
 
  private:
   // If true, AttemptOneApplication will skip over |entry| and return true.
   bool SkipUpdate(const syncable::Entry& entry);
 
   // Used to decrypt sensitive sync nodes.
   Cryptographer* cryptographer_;
 
-  ModelSafeGroup group_filter_;
-
-  const ModelSafeRoutingInfo routing_info_;
-
   DISALLOW_COPY_AND_ASSIGN(UpdateApplicator);
 
   int updates_applied_;
   int encryption_conflicts_;
   int hierarchy_conflicts_;
   std::set<syncable::Id> simple_conflict_ids_;
 };
 
 }  // namespace syncer
 
 #endif  // SYNC_ENGINE_UPDATE_APPLICATOR_H_