Adds window resizing

components/mus/public/cpp/tests/test_window.h

Index: components/mus/public/cpp/tests/test_window.h
diff --git a/components/mus/public/cpp/tests/test_window.h b/components/mus/public/cpp/tests/test_window.h
new file mode 100644
index 0000000000000000000000000000000000000000..a7b458d6eee10345630b647510bd430a7f8288e9
--- /dev/null
+++ b/components/mus/public/cpp/tests/test_window.h
@@ -0,0 +1,26 @@
+// 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 COMPONENTS_MUS_PUBLIC_CPP_TESTS_TEST_WINDOW_H_
+#define COMPONENTS_MUS_PUBLIC_CPP_TESTS_TEST_WINDOW_H_
+
+#include "base/macros.h"
+#include "components/mus/public/cpp/lib/window_private.h"
+#include "components/mus/public/cpp/window.h"
+
+namespace mus {
+
+// Subclass with public ctor/dtor.
+class TestWindow : public Window {
+ public:
+  TestWindow() { WindowPrivate(this).set_id(1); }
+  ~TestWindow() {}
+
+ private:
+  MOJO_DISALLOW_COPY_AND_ASSIGN(TestWindow);
+};
+
+}  // namespace mus
+
+#endif  // COMPONENTS_MUS_PUBLIC_CPP_TESTS_TEST_WINDOW_H_