aura: Implement new app list mock.

ash/app_list/app_list_model_view.h

Index: ash/app_list/app_list_model_view.h
diff --git a/ash/app_list/app_list_model_view.h b/ash/app_list/app_list_model_view.h
new file mode 100644
index 0000000000000000000000000000000000000000..be034d2a55119c1208f2014c57a0752bdf04b736
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+++ b/ash/app_list/app_list_model_view.h
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+// 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 ASH_APP_LIST_APP_LIST_MODEL_VIEW_H_
+#define ASH_APP_LIST_APP_LIST_MODEL_VIEW_H_
+#pragma once
+
+#include <string>
+#include <vector>
+
+#include "ash/ash_export.h"
+#include "ui/base/models/list_model_observer.h"
+#include "ui/views/controls/button/button.h"
+#include "ui/views/view.h"
+
+namespace views {
+class BoundsAnimator;
+}
+
+namespace ash {
+
+class AppListModel;
+
+// AppListModelView displays the UI for an AppListModel.
+class ASH_EXPORT AppListModelView : public views::View,
+                                    public ui::ListModelObserver {
+ public:
+  AppListModelView(AppListModel* model,
+                   views::ButtonListener* listener);
+  virtual ~AppListModelView();
+
+ private:
+  // Updates from model.
+  void Update();
+
+  // Sets focused tile by index.
+  void SetFocusedTileByIndex(int index);
+
+  // Overridden from views::View:
+  virtual void Layout() OVERRIDE;
+
+  // Overridden from ListModelObserver:
+  virtual void ListItemsAdded(int start, int count) OVERRIDE;
+  virtual void ListItemsRemoved(int start, int count) OVERRIDE;
+  virtual void ListItemsChanged(int start, int count) OVERRIDE;
+
+  AppListModel* model_;  // Owned by parent AppListView.
+  views::ButtonListener* listener_;
+
+  DISALLOW_COPY_AND_ASSIGN(AppListModelView);
+};
+
+}  // namespace ash
+
+#endif  // ASH_APP_LIST_APP_LIST_MODEL_VIEW_H_