Eliminate WindowTreeConnection

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

+// Copyright 2016 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_WINDOW_TREE_CLIENT_PRIVATE_H_
+#define COMPONENTS_MUS_PUBLIC_CPP_TESTS_WINDOW_TREE_CLIENT_PRIVATE_H_
+
+#include <stdint.h>
+
+#include "base/macros.h"
+
+namespace ui {
+class Event;
+}
+
+namespace mus {
+namespace mojom {
+class WindowTree;
+}
+
+class Window;
+class WindowTreeClient;
+
+// Use to access implementation details of WindowTreeClient.
+class WindowTreeClientPrivate {
+ public:
+  explicit WindowTreeClientPrivate(WindowTreeClient* tree_client_impl);
+  explicit WindowTreeClientPrivate(Window* window);
+  ~WindowTreeClientPrivate();
+
+  uint32_t event_observer_id();
+
+  // Calls OnEmbed() on the WindowTreeClient.
+  void OnEmbed(mojom::WindowTree* window_tree);
+
+  // Pretends that |event| has been received from the window server.
+  void CallOnWindowInputEvent(Window* window, const ui::Event& event);
+
+ private:
+   WindowTreeClient* tree_client_impl_;
+
+  DISALLOW_COPY_AND_ASSIGN(WindowTreeClientPrivate);
+};
+
+}  // namespace mus
+
+#endif  // COMPONENTS_MUS_PUBLIC_CPP_TESTS_WINDOW_TREE_CLIENT_PRIVATE_H_