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

ash/login/ui/lock_screen_test.cc

+// 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_screen_test.h"
+
+#include "ui/views/widget/widget.h"
+
+namespace ash {
+
+LockScreenTest::LockScreenTest() {}
+
+LockScreenTest::~LockScreenTest() {}
+
+void LockScreenTest::PressSubmitButton() {}
+
+void LockScreenTest::SetUp() {
+  views::test::WidgetTest::SetUp();
+
+  views::Widget::InitParams params =
+      CreateParams(views::Widget::InitParams::TYPE_WINDOW_FRAMELESS);
+  params.show_state = ui::SHOW_STATE_FULLSCREEN;
+  params.opacity = views::Widget::InitParams::TRANSLUCENT_WINDOW;
+
+  widget_ = new views::Widget();
+  widget_->Init(params);
+}
+
+void LockScreenTest::TearDown() {
+  widget_->Close();
+
+  views::test::WidgetTest::TearDown();
+}
+
+}  // ash