Move tray code from ui/chromeos/network/

ui/chromeos/network/network_list_view_base.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 UI_CHROMEOS_NETWORK_NETWORK_LIST_VIEW_BASE_H_
-#define UI_CHROMEOS_NETWORK_NETWORK_LIST_VIEW_BASE_H_
-
-#include <string>
-
-#include "base/macros.h"
-#include "ui/chromeos/ui_chromeos_export.h"
-
-namespace views {
-class View;
-}
-
-namespace ui {
-
-// Base class for a list of available networks (and, in the case of VPNs, the
-// list of available VPN providers).
-class UI_CHROMEOS_EXPORT NetworkListViewBase {
- public:
-  NetworkListViewBase();
-  virtual ~NetworkListViewBase();
-
-  void set_container(views::View* container) { container_ = container; }
-
-  // Refreshes the network list.
-  virtual void Update() = 0;
-
-  // Checks whether |view| represents a network in the list. If yes, sets
-  // |service_path| to the network's service path and returns |true|. Otherwise,
-  // leaves |sevice_path| unchanged and returns |false|.
-  virtual bool IsNetworkEntry(views::View* view,
-                              std::string* service_path) const = 0;
-
- protected:
-  views::View* container() { return container_; }
-
- private:
-  // The container that holds the actual list entries.
-  views::View* container_ = nullptr;
-
-  DISALLOW_COPY_AND_ASSIGN(NetworkListViewBase);
-};
-
-}  // namespace ui
-
-#endif  // UI_CHROMEOS_NETWORK_NETWORK_LIST_VIEW_BASE_H_