Add ArcNotificationManager for new ARC notification

components/arc/arc_service_manager.cc

Index: components/arc/arc_service_manager.cc
diff --git a/components/arc/arc_service_manager.cc b/components/arc/arc_service_manager.cc
index 0e18308aa106ba1c5455188d3aae6b61bb4c44fa..0906423fd71165dd7fb91508c5c1f41063342570 100644
--- a/components/arc/arc_service_manager.cc
+++ b/components/arc/arc_service_manager.cc
@@ -11,6 +11,7 @@
 #include "components/arc/input/arc_input_bridge.h"
 #include "components/arc/power/arc_power_bridge.h"
 #include "components/arc/settings/arc_settings_bridge.h"
+#include "ui/arc/notification/arc_notification_manager.h"
 
 namespace arc {
 
@@ -52,4 +53,12 @@ ArcBridgeService* ArcServiceManager::arc_bridge_service() {
   return arc_bridge_service_.get();
 }
 
+void ArcServiceManager::OnPrimaryUserProfilePrepared(
+    const AccountId& account_id) {
+  DCHECK(thread_checker_.CalledOnValidThread());
+
+  arc_notification_manager_.reset(
+      new ArcNotificationManager(arc_bridge_service(), account_id));
+}
+
 }  // namespace arc