Revert "Remove aura and make a pure mojo::View version of the aura::Window FocusController."

mojo/services/window_manager/basic_focus_rules.h

-// Copyright 2014 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 MOJO_SERIVCES_WINDOW_MANAGER_BASIC_FOCUS_RULES_H_
-#define MOJO_SERIVCES_WINDOW_MANAGER_BASIC_FOCUS_RULES_H_
-
-#include "mojo/services/window_manager/focus_rules.h"
-
-namespace mojo {
-
-class WindowManagerApp;
-class View;
-
-// The focusing rules used inside a window manager.
-//
-// This is intended to be a user supplyable, subclassable component passed to
-// WindowManagerApp, allowing for the creation of other window managers.
-//
-// TODO(erg): This was a straight move of the minimal focus rules from when
-// WindowManagerApp directly used the wm::FocusController. This implementation
-// is very incomplete. crbug.com/431047
-class BasicFocusRules : public FocusRules {
- public:
-  BasicFocusRules(mojo::WindowManagerApp* window_manager_app,
-                  mojo::View* window_container);
-  ~BasicFocusRules() override;
-
- protected:
-  // Overridden from mojo::FocusRules:
-  bool IsToplevelView(mojo::View* view) const override;
-  bool CanActivateView(mojo::View* view) const override;
-  bool CanFocusView(mojo::View* view) const override;
-  mojo::View* GetToplevelView(mojo::View* view) const override;
-  mojo::View* GetActivatableView(mojo::View* view) const override;
-  mojo::View* GetFocusableView(mojo::View* view) const override;
-  mojo::View* GetNextActivatableView(mojo::View* activatable) const override;
-
- private:
-  mojo::View* window_container_;
-  mojo::WindowManagerApp* window_manager_app_;
-
-  DISALLOW_COPY_AND_ASSIGN(BasicFocusRules);
-};
-
-}  // namespace mojo
-
-#endif  // MOJO_SERIVCES_WINDOW_MANAGER_BASIC_FOCUS_RULES_H_