cros: Basic test infrastructure for views-based lock screen.

ash/login/ui/simple_lock_screen_test.cc

Index: ash/login/ui/simple_lock_screen_test.cc
diff --git a/ash/login/ui/simple_lock_screen_test.cc b/ash/login/ui/simple_lock_screen_test.cc
new file mode 100644
index 0000000000000000000000000000000000000000..648df9c6e1d0f0324341742745b469eb12405e2b
--- /dev/null
+++ b/ash/login/ui/simple_lock_screen_test.cc
@@ -0,0 +1,16 @@
+// 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 "ash/login/ui/lock_contents_view.h"
+#include "ash/login/ui/lock_screen.h"
+#include "ash/login/ui/lock_screen_test.h"
+
+namespace ash {
+
+TEST_F(LockScreenTest, Show) {
+  widget_->SetContentsView(new LockContentsView());
+  widget_->Show();
+}
+
+}  // namespace ash