[Aura] Implement views-based applist.

ui/aura_shell/app_list/app_list_model.h

+// Copyright (c) 2011 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_AURA_SHELL_APP_LIST_APP_LIST_MODEL_H_
+#define UI_AURA_SHELL_APP_LIST_APP_LIST_MODEL_H_
+#pragma once
+
+#include "base/basictypes.h"
+#include "ui/aura_shell/app_list/app_list_item_group_model.h"
+#include "ui/aura_shell/aura_shell_export.h"
+#include "ui/base/models/list_model.h"
+
+namespace aura_shell {
+
+// Model for AppListView. It is consisted of a list of AppListItemGroupModels,
+// which in turn owns a list of AppListItemModels.
+class AURA_SHELL_EXPORT AppListModel

[sky, 2011/12/14 16:51:33]

Do you even need a new class for this? Can't this be a typedef?

[xiyuan, 2011/12/20 00:14:42]

Not sure about whether we should use typedef here. If we do, then we need to
pull this header in all other headers that refers to this instead of forward
declare a class there.

+    : public ui::ListModel<AppListItemGroupModel> {
+ public:
+  AppListModel();
+  virtual ~AppListModel();
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(AppListModel);
+};
+
+}  // namespace aura_shell
+
+#endif  // UI_AURA_SHELL_APP_LIST_APP_LIST_MODEL_H_