Split out Ash dependency in app info dialog unittests

ui/views/test/scoped_views_test_helper.h

+// Copyright 2015 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 UI_VIEWS_TEST_SCOPED_VIEWS_TEST_HELPER_H_
+#define UI_VIEWS_TEST_SCOPED_VIEWS_TEST_HELPER_H_
+
+#include "base/macros.h"
+#include "base/memory/scoped_ptr.h"
+#include "ui/gfx/native_widget_types.h"
+
+namespace views {
+
+class TestViewsDelegate;
+class ViewsTestHelper;
+
+// Creates a ViewsTestHelper that is released automatically. Acts like
+// ViewsTestBase but allows a test harness to use a different base class, or
+// make use of a TestBrowserThreadBundle, rather than the MessageLoop provided
+// by ViewsTestBase.
+class ScopedViewsTestHelper {
+ public:
+  // Initialize with the default TestViewsDelegate, MessageLoopForUI::current()
+  // and the default test ContextFactory.
+  ScopedViewsTestHelper();
+
+  // Initialize with the given TestViewsDelegate instance, after setting the
+  // ContextFactory.
+  explicit ScopedViewsTestHelper(scoped_ptr<TestViewsDelegate> views_delegate);
+
+  ~ScopedViewsTestHelper();
+
+  // Returns the context for creating new windows. In Aura builds, this will be
+  // the RootWindow. Everywhere else, null.
+  gfx::NativeWindow GetContext();
+
+  TestViewsDelegate* views_delegate() { return views_delegate_.get(); };
+
+ private:
+  scoped_ptr<TestViewsDelegate> views_delegate_;
+  scoped_ptr<ViewsTestHelper> test_helper_;
+
+  DISALLOW_COPY_AND_ASSIGN(ScopedViewsTestHelper);
+};
+
+}  // namespace views
+
+#endif  // UI_VIEWS_TEST_SCOPED_VIEWS_TEST_HELPER_H_