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

mojo/services/window_manager/basic_focus_rules.cc

-// 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.
-
-#include "mojo/services/window_manager/basic_focus_rules.h"
-
-#include "base/macros.h"
-#include "mojo/services/public/cpp/view_manager/view.h"
-#include "mojo/services/window_manager/window_manager_app.h"
-
-namespace mojo {
-
-BasicFocusRules::BasicFocusRules(mojo::WindowManagerApp* window_manager_app,
-                           mojo::View* window_container)
-    : window_container_(window_container),
-      window_manager_app_(window_manager_app) {}
-
-BasicFocusRules::~BasicFocusRules() {}
-
-bool BasicFocusRules::IsToplevelView(mojo::View* view) const {
-  return view->parent() == window_container_;
-}
-
-bool BasicFocusRules::CanActivateView(mojo::View* view) const {
-  // TODO(erg): This needs to check visibility, along with focus, and several
-  // other things (see wm::BaseFocusRules).
-  return view->parent() == window_container_;
-}
-
-bool BasicFocusRules::CanFocusView(mojo::View* view) const {
-  return true;
-}
-
-mojo::View* BasicFocusRules::GetToplevelView(mojo::View* view) const {
-  while (view->parent() != window_container_) {
-    view = view->parent();
-    // Unparented hierarchy, there is no "top level" window.
-    if (!view)
-      return nullptr;
-  }
-
-  return view;
-}
-
-mojo::View* BasicFocusRules::GetActivatableView(mojo::View* view) const {
-  return GetToplevelView(view);
-}
-
-mojo::View* BasicFocusRules::GetFocusableView(mojo::View* view) const {
-  return view;
-}
-
-mojo::View* BasicFocusRules::GetNextActivatableView(
-    mojo::View* activatable) const {
-  const mojo::View::Children& children = activatable->parent()->children();
-  for (mojo::View::Children::const_reverse_iterator it = children.rbegin();
-       it != children.rend(); ++it) {
-    if (*it != activatable)
-      return *it;
-  }
-  return nullptr;
-}
-
-}  // namespace mojo