Make SyncBackendRegistrar aware of loaded data

sync/internal_api/sync_manager_impl.cc

Index: sync/internal_api/sync_manager_impl.cc
diff --git a/sync/internal_api/sync_manager_impl.cc b/sync/internal_api/sync_manager_impl.cc
index 6a164d8f0ff2aac4ff56893cfc13914c323e1737..eac7e49424785dea21901a6f2e41593c1fee684f 100644
--- a/sync/internal_api/sync_manager_impl.cc
+++ b/sync/internal_api/sync_manager_impl.cc
@@ -369,7 +369,6 @@ bool SyncManagerImpl::Init(
     bool use_ssl,
     const scoped_refptr<base::TaskRunner>& blocking_task_runner,
     scoped_ptr<HttpPostProviderFactory> post_factory,
-    const ModelSafeRoutingInfo& model_safe_routing_info,
     const std::vector<ModelSafeWorker*>& workers,
     ExtensionsActivityMonitor* extensions_activity_monitor,
     SyncManager::ChangeDelegate* change_delegate,
@@ -425,6 +424,8 @@ bool SyncManagerImpl::Init(
 
   connection_manager_->AddListener(this);
 
+  bool success = SignIn(credentials);
+
   // Build a SyncSessionContext and store the worker in it.
   DVLOG(1) << "Sync is bringing up SyncSessionContext.";
   std::vector<SyncEngineEventListener*> listeners;
@@ -433,7 +434,6 @@ bool SyncManagerImpl::Init(
   session_context_ = internal_components_factory->BuildContext(
       connection_manager_.get(),
       directory(),
-      model_safe_routing_info,
       workers,
       extensions_activity_monitor,
       &throttled_data_type_tracker_,
@@ -444,8 +444,6 @@ bool SyncManagerImpl::Init(
   scheduler_ = internal_components_factory->BuildScheduler(
       name_, session_context_.get()).Pass();
 
-  bool success = SignIn(credentials);
-
   if (success) {
     scheduler_->Start(SyncScheduler::CONFIGURATION_MODE);
 
@@ -482,7 +480,8 @@ bool SyncManagerImpl::Init(
   FOR_EACH_OBSERVER(SyncManager::Observer, observers_,
                     OnInitializationComplete(
                         MakeWeakHandle(weak_ptr_factory_.GetWeakPtr()),
-                        success));
+                        success, success ? InitialSyncEndedTypes()
+                                         : syncer::ModelTypeSet()));
   if (!success)
     return false;