mus: Remove the old client lib.

services/ui/public/cpp/scoped_window_ptr.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 SERVICES_UI_PUBLIC_CPP_SCOPED_WINDOW_PTR_H_
-#define SERVICES_UI_PUBLIC_CPP_SCOPED_WINDOW_PTR_H_
-
-#include "base/macros.h"
-#include "services/ui/public/cpp/window_observer.h"
-
-namespace ui {
-
-// Wraps a Window, taking overship of the Window. Also deals with Window being
-// destroyed while ScopedWindowPtr still exists.
-class ScopedWindowPtr : public WindowObserver {
- public:
-  explicit ScopedWindowPtr(Window* window);
-  ~ScopedWindowPtr() override;
-
-  // Destroys |window|. If |window| is a root of the WindowManager than the
-  // WindowManager is destroyed (which in turn destroys |window|).
-  //
-  // NOTE: this function (and class) are only useful for clients that only
-  // ever have a single root.
-  static void DeleteWindowOrWindowManager(Window* window);
-
-  Window* window() { return window_; }
-  const Window* window() const { return window_; }
-
- private:
-  void DetachFromWindow();
-
-  void OnWindowDestroying(Window* window) override;
-
-  Window* window_;
-
-  DISALLOW_COPY_AND_ASSIGN(ScopedWindowPtr);
-};
-
-}  // namespace ui
-
-#endif  // SERVICES_UI_PUBLIC_CPP_SCOPED_WINDOW_PTR_H_