[not for review] sync: Don't use group_restriction from ApplyUpdatesCommand.

sync/engine/apply_updates_command.cc

Index: sync/engine/apply_updates_command.cc
diff --git a/sync/engine/apply_updates_command.cc b/sync/engine/apply_updates_command.cc
index 79fd039ba2312e35e647fb65368b519692482aad..f03f2611a785cf6b831f290b6e09b68a2c2248b0 100644
--- a/sync/engine/apply_updates_command.cc
+++ b/sync/engine/apply_updates_command.cc
@@ -18,63 +18,33 @@ ApplyUpdatesCommand::~ApplyUpdatesCommand() {}
 
 std::set<ModelSafeGroup> ApplyUpdatesCommand::GetGroupsToChange(
     const sessions::SyncSession& session) const {
-  std::set<ModelSafeGroup> groups_with_unapplied_updates;
-
-  syncable::FullModelTypeSet server_types_with_unapplied_updates;
-  {
-    syncable::Directory* dir = session.context()->directory();
-    syncable::ReadTransaction trans(FROM_HERE, dir);
-    server_types_with_unapplied_updates =
-        dir->GetServerTypesWithUnappliedUpdates(&trans);
-  }
-
-  for (syncable::FullModelTypeSet::Iterator it =
-           server_types_with_unapplied_updates.First(); it.Good(); it.Inc()) {
-    groups_with_unapplied_updates.insert(
-        GetGroupForModelType(it.Get(), session.routing_info()));
-  }
-
-  return groups_with_unapplied_updates;
+  return session.status_controller().GetModelSafeGroupsWithUnappliedUpdates();
 }
 
 SyncerError ApplyUpdatesCommand::ModelChangingExecuteImpl(
     SyncSession* session) {
   syncable::Directory* dir = session->context()->directory();
   syncable::WriteTransaction trans(FROM_HERE, syncable::SYNCER, dir);
-
-  // Compute server types with unapplied updates that fall under our
-  // group restriction.
-  const syncable::FullModelTypeSet server_types_with_unapplied_updates =
-      dir->GetServerTypesWithUnappliedUpdates(&trans);
-  syncable::FullModelTypeSet server_type_restriction;
-  for (syncable::FullModelTypeSet::Iterator it =
-           server_types_with_unapplied_updates.First(); it.Good(); it.Inc()) {
-    if (GetGroupForModelType(it.Get(), session->routing_info()) ==
-        session->status_controller().group_restriction()) {
-      server_type_restriction.Put(it.Get());
-    }
-  }
-
-  std::vector<int64> handles;
-  dir->GetUnappliedUpdateMetaHandles(
-      &trans, server_type_restriction, &handles);
+  sessions::StatusController* status =
+      session->mutable_status_controller();
 
   UpdateApplicator applicator(
       session->context()->resolver(),
       dir->GetCryptographer(&trans),
-      handles.begin(), handles.end(), session->routing_info(),
-      session->status_controller().group_restriction());
+      status->mutable_update_progress()->unapplied_updates()->begin(),
+      status->mutable_update_progress()->unapplied_updates()->end(),
+      session->routing_info(),
+      status->group_restriction());
   while (applicator.AttemptOneApplication(&trans)) {}
   applicator.SaveProgressIntoSessionState(
-      session->mutable_status_controller()->mutable_conflict_progress(),
-      session->mutable_status_controller()->mutable_update_progress());
+      status->mutable_conflict_progress(),
+      status->mutable_update_progress());
 
   // This might be the first time we've fully completed a sync cycle, for
   // some subset of the currently synced datatypes.
-  const sessions::StatusController& status(session->status_controller());
-  if (status.ServerSaysNothingMoreToDownload()) {
+  if (status->ServerSaysNothingMoreToDownload()) {
     for (syncable::ModelTypeSet::Iterator it =
-             status.updates_request_types().First(); it.Good(); it.Inc()) {
+             status->updates_request_types().First(); it.Good(); it.Inc()) {
       // This gets persisted to the directory's backing store.
       dir->set_initial_sync_ended_for_type(it.Get(), true);
     }