sync: Per-type update application

sync/syncable/directory.h

 // Copyright 2013 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_SYNCABLE_DIRECTORY_H_
 #define SYNC_SYNCABLE_DIRECTORY_H_
 
 #include <deque>
 #include <set>
 #include <string>
@@ skipping 297 matching lines @@
 
   // Returns the number of entities with the unsynced bit set.
   int64 unsynced_entity_count() const;
 
   // Get GetUnsyncedMetaHandles should only be called after SaveChanges and
   // before any new entries have been created. The intention is that the
   // syncer should call it from its PerformSyncQueries member.
   void GetUnsyncedMetaHandles(BaseTransaction* trans,
                               Metahandles* result);
 
-  // Returns all server types with unapplied updates.  A subset of
-  // those types can then be passed into
-  // GetUnappliedUpdateMetaHandles() below.
-  FullModelTypeSet GetServerTypesWithUnappliedUpdates(
-      BaseTransaction* trans) const;
+  // Returns whether or not this |type| has unapplied updates.
+  bool TypeHasUnappliedUpdates(ModelType type);
 
   // Get all the metahandles for unapplied updates for a given set of
   // server types.
   void GetUnappliedUpdateMetaHandles(BaseTransaction* trans,
                                      FullModelTypeSet server_types,
                                      std::vector<int64>* result);
 
   // Get metahandle counts for various criteria to show on the
   // about:sync page. The information is computed on the fly
   // each time. If this results in a significant performance hit,
@@ skipping 218 matching lines @@
   // are deleted in native models as well.
   scoped_ptr<DeleteJournal> delete_journal_;
 
   DISALLOW_COPY_AND_ASSIGN(Directory);
 };
 
 }  // namespace syncable
 }  // namespace syncer
 
 #endif // SYNC_SYNCABLE_DIRECTORY_H_