Introduce centered view and bottom view for home card.

athena/home/bottom_home_view.h

+// 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.
+
+#ifndef ATHENA_HOME_BOTTOM_HOME_VIEW_H_
+#define ATHENA_HOME_BOTTOM_HOME_VIEW_H_
+
+#include "ui/app_list/views/search_box_view_delegate.h"
+#include "ui/views/view.h"
+
+namespace app_list {
+class AppListViewDelegate;
+}
+
+namespace athena {
+
+// The view of 'VISIBLE_BOTTOM' state of home card, which occupies
+// smaller area and provides limited functionalities.
+class BottomHomeView : public views::View,
+                       public app_list::SearchBoxViewDelegate {
+ public:
+  explicit BottomHomeView(app_list::AppListViewDelegate* delegate);
+  virtual ~BottomHomeView();
+
+ private:
+  // Overridden from app_list::SearchBoxViewDelegate:
+  virtual void QueryChanged(app_list::SearchBoxView* sender) OVERRIDE;
+
+  app_list::AppListViewDelegate* view_delegate_;
+
+  DISALLOW_COPY_AND_ASSIGN(BottomHomeView);
+};
+
+}  // namespace athena
+
+#endif  // ATHENA_HOME_BOTTOM_HOME_VIEW_H_