Call session_manager's EmitArcBooted() D-Bus method when ARC is ready

chromeos/dbus/session_manager_client.h

Index: chromeos/dbus/session_manager_client.h
diff --git a/chromeos/dbus/session_manager_client.h b/chromeos/dbus/session_manager_client.h
index 0a6296ff25621592abf82ffeafdb9915654511f3..41a7e4c56551e04e22b2b8c98da9d6786e0286dc 100644
--- a/chromeos/dbus/session_manager_client.h
+++ b/chromeos/dbus/session_manager_client.h
@@ -248,6 +248,9 @@ class CHROMEOS_EXPORT SessionManagerClient : public DBusClient {
   // will be ignored.
   virtual void PrioritizeArcInstance(const ArcCallback& callback) = 0;
 
+  // Emits the "arc-booted" upstart signal.
+  virtual void EmitArcBooted() = 0;
+
   // Asynchronously retrieves the timestamp which ARC instance is invoked or
   // returns false if there is no ARC instance or ARC is not available.
   virtual void GetArcStartTime(const GetArcStartTimeCallback& callback) = 0;