Add Start/Stop Container dbus messages

Change-Id: I59fface53ea544d01799c90e8d57f8efd7afc528
Reviewed-on: https://chromium-review.googlesource.com/329638
Commit-Ready: Dylan Reid <dgreid@chromium.org>
Tested-by: Dylan Reid <dgreid@chromium.org>
Reviewed-by: Junichi Uekawa <uekawa@chromium.org>
diff --git a/dbus/login_manager/dbus-constants.h b/dbus/login_manager/dbus-constants.h
index a023c07..799aebc 100644
--- a/dbus/login_manager/dbus-constants.h
+++ b/dbus/login_manager/dbus-constants.h
@@ -52,6 +52,8 @@
 const char kSessionManagerStartArcInstance[] = "StartArcInstance";
 const char kSessionManagerStopArcInstance[] = "StopArcInstance";
 const char kSessionManagerGetArcStartTimeTicks[] = "GetArcStartTimeTicks";
+const char kSessionManagerStartContainer[] = "StartContainer";
+const char kSessionManagerStopContainer[] = "StopContainer";
 // Signals
 const char kLoginPromptVisibleSignal[] = "LoginPromptVisible";
 const char kSessionStateChangedSignal[] = "SessionStateChanged";