Support for multiple sync ModelSafeWorkers....

chrome/browser/sync/sessions/sync_session.cc

 // Copyright (c) 2009 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.
 
 #include "chrome/browser/sync/sessions/sync_session.h"
 #include "chrome/browser/sync/syncable/directory_manager.h"
 
 namespace browser_sync {
 namespace sessions {
 
 SyncSession::SyncSession(SyncSessionContext* context, Delegate* delegate)
     : context_(context),
       source_(sync_pb::GetUpdatesCallerInfo::UNKNOWN),
       write_transaction_(NULL),
       delegate_(delegate),
       auth_failure_occurred_(false) {
+
+  std::vector<ModelSafeWorker*>* s =
+      const_cast<std::vector<ModelSafeWorker*>* >(&workers_);
+  context_->registrar()->GetWorkers(s);
+
+  // TODO(tim): Use ModelSafeRoutingInfo to silo parts of the session status by
+  // ModelSafeGroup;
+  // e.g. have a map<class, commit_ids>, map<class, ConflictProgress> etc.
+  // The routing will be used to map multiple model types into the right silo.
+  // The routing info can't change throughout a session, so we're assured that
+  // (for example) commit_ids for syncable::AUTOFILL items that were being
+  // processed as part of the GROUP_PASSIVE run (because they weren't being
+  // synced) *continue* to be for this whole session, even though the
+  // ModelSafeWorkerRegistrar may be configured to route syncable::AUTOFILL to
+  // GROUP_DB now.
+  group_restriction_in_effect_ = false;
+  group_restriction_ = GROUP_PASSIVE;
 }
 
 SyncSessionSnapshot SyncSession::TakeSnapshot() const {
   syncable::ScopedDirLookup dir(context_->directory_manager(),
                                 context_->account_name());
   if (!dir.good())
     LOG(ERROR) << "Scoped dir lookup failed!";
 
   const bool is_share_usable = dir->initial_sync_ended();
   return SyncSessionSnapshot(
@@ skipping 22 matching lines @@
       status.conflict_sets_built() ||
       status.conflicts_resolved() ||
       // Or, we have conflicting updates, but we're making progress on
       // resolving them...
       !status.got_zero_updates() ||
       status.timestamp_dirty();
 }
 
 }  // namespace sessions
 }  // namespace browser_sync