mash: Migrate shelf app list button to wm common types

ash/shelf/app_list_shelf_item_delegate.cc

-// Copyright 2013 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 "ash/shelf/app_list_shelf_item_delegate.h"
-
-#include "ash/common/shelf/shelf_model.h"
-#include "ash/shell.h"
-#include "grit/ash_strings.h"
-#include "ui/app_list/app_list_switches.h"
-#include "ui/base/l10n/l10n_util.h"
-
-namespace ash {
-
-AppListShelfItemDelegate::AppListShelfItemDelegate() {
-  ShelfItem app_list;
-  app_list.type = TYPE_APP_LIST;
-  Shell::GetInstance()->shelf_model()->Add(app_list);
-}
-
-AppListShelfItemDelegate::~AppListShelfItemDelegate() {
-  // ShelfItemDelegateManager owns and destroys this class.
-}
-
-ShelfItemDelegate::PerformedAction AppListShelfItemDelegate::ItemSelected(
-    const ui::Event& event) {
-  // Pass NULL here to show the app list in the currently active RootWindow.
-  Shell::GetInstance()->ToggleAppList(NULL);
-  return ShelfItemDelegate::kAppListMenuShown;
-}
-
-base::string16 AppListShelfItemDelegate::GetTitle() {
-  ShelfModel* model = Shell::GetInstance()->shelf_model();
-  DCHECK(model);
-  int title_id;
-  if (app_list::switches::IsExperimentalAppListEnabled()) {
-    title_id = model->status() == ShelfModel::STATUS_LOADING
-                   ? IDS_ASH_SHELF_APP_LIST_LAUNCHER_SYNCING_TITLE
-                   : IDS_ASH_SHELF_APP_LIST_LAUNCHER_TITLE;
-  } else {
-    title_id = model->status() == ShelfModel::STATUS_LOADING
-                   ? IDS_ASH_SHELF_APP_LIST_SYNCING_TITLE
-                   : IDS_ASH_SHELF_APP_LIST_TITLE;
-  }
-  return l10n_util::GetStringUTF16(title_id);
-}
-
-ShelfMenuModel* AppListShelfItemDelegate::CreateApplicationMenu(
-    int event_flags) {
-  // AppList does not show an application menu.
-  return NULL;
-}
-
-bool AppListShelfItemDelegate::IsDraggable() {
-  return false;
-}
-
-bool AppListShelfItemDelegate::CanPin() const {
-  return true;
-}
-
-bool AppListShelfItemDelegate::ShouldShowTooltip() {
-  return true;
-}
-
-void AppListShelfItemDelegate::Close() {}
-
-}  // namespace ash