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 3f56538533bb2b8e809829980002a5d6f17623c8..414673800a81cc378b92b29516329c07d79ca703 100644
--- a/components/arc/arc_service_manager.cc
+++ b/components/arc/arc_service_manager.cc
@@ -16,6 +16,7 @@
 #include "components/arc/power/arc_power_bridge.h"
 #include "components/arc/settings/arc_settings_bridge.h"
 #include "components/arc/video/arc_video_bridge.h"
+#include "ui/arc/notification/arc_notification_manager.h"
 
 namespace arc {
 
@@ -64,4 +65,12 @@ 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