Add SaveLoginPassword interface constant.

BUG=chromium:386606

Change-Id: Ia0a6b727fd7b5251eeeab0a396e9d394ff2667a4
Reviewed-on: https://chromium-review.googlesource.com/847689
Commit-Ready: May Lippert <maybelle@chromium.org>
Tested-by: May Lippert <maybelle@chromium.org>
Reviewed-by: Zentaro Kavanagh <zentaro@chromium.org>
diff --git a/dbus/login_manager/dbus-constants.h b/dbus/login_manager/dbus-constants.h
index 490f240..1e24d56 100644
--- a/dbus/login_manager/dbus-constants.h
+++ b/dbus/login_manager/dbus-constants.h
@@ -12,6 +12,7 @@
 // Methods
 const char kSessionManagerEmitLoginPromptVisible[] = "EmitLoginPromptVisible";
 const char kSessionManagerEnableChromeTesting[] = "EnableChromeTesting";
+const char kSessionManagerSaveLoginPassword[] = "SaveLoginPassword";
 const char kSessionManagerStartSession[] = "StartSession";
 const char kSessionManagerStopSession[] = "StopSession";
 const char kSessionManagerRestartJob[] = "RestartJob";