If force-sign-in policy is enabled, popup warning dialog before window closing if auth token becom…

chrome/browser/signin/force_signout_timer.cc

Index: chrome/browser/signin/force_signout_timer.cc
diff --git a/chrome/browser/signin/force_signout_timer.cc b/chrome/browser/signin/force_signout_timer.cc
new file mode 100644
index 0000000000000000000000000000000000000000..58b4b4c4742cc15d4d6b434873d861e71f2cf54d
--- /dev/null
+++ b/chrome/browser/signin/force_signout_timer.cc
@@ -0,0 +1,9 @@
+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "chrome/browser/signin/force_signout_timer.h"
+
+void ForceSignoutTimer::Start() {
+  // TODO(zmin): start signout timer.
+}