arc: Add cryptohome_id to EmitArcBooted.

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 781143ea8f92cc199c08d5b7eea47640d886f32a..372890a48e3a6752b4a20851d7debe064e032974 100644
--- a/chromeos/dbus/session_manager_client.h
+++ b/chromeos/dbus/session_manager_client.h
@@ -270,7 +270,8 @@ class CHROMEOS_EXPORT SessionManagerClient : public DBusClient {
       const ArcCallback& callback) = 0;
 
   // Emits the "arc-booted" upstart signal.
-  virtual void EmitArcBooted() = 0;
+  virtual void EmitArcBooted(const cryptohome::Identification& cryptohome_id,
+                             const ArcCallback& callback) = 0;
 
   // Asynchronously retrieves the timestamp which ARC instance is invoked or
   // returns false if there is no ARC instance or ARC is not available.