cros: Simple password view for lock. Adds test support.

ash/login/ui/login_test_base.h

+// 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.
+
+#ifndef ASH_LOGIN_UI_LOGIN_TEST_BASE_H_
+#define ASH_LOGIN_UI_LOGIN_TEST_BASE_H_
+
+#include "ash/test/ash_test_base.h"
+#include "base/macros.h"
+
+namespace views {
+class View;
+class Widget;
+}  // namespace views
+
+namespace ash {
+
+// Base test fixture for testing the views-based login and lock screens. This
+// class provides easy access to types which the login/lock frequently need.
+class LoginTestBase : public test::AshTestBase {
+ public:
+  LoginTestBase();
+  ~LoginTestBase() override;
+
+  // Creates and displays a widget containing |content|.
+  void ShowWidgetWithContent(views::View* content);
+
+  views::Widget* widget() const { return widget_; }
+
+  // test::AshTestBase:
+  void TearDown() override;
+
+ private:
+  class WidgetDelegate;
+
+  views::Widget* widget_ = nullptr;
+  std::unique_ptr<WidgetDelegate> delegate_;
+
+  DISALLOW_COPY_AND_ASSIGN(LoginTestBase);
+};
+
+}  // namespace ash
+
+#endif  // ASH_LOGIN_UI_LOGIN_TEST_BASE_H_