app_list: Add search box and search result view for v2.

ui/app_list/search_result_list_view_delegate.h

+// Copyright (c) 2012 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_APP_LIST_SEARCH_RESULT_LIST_VIEW_DELEGATE_H_
+#define UI_APP_LIST_SEARCH_RESULT_LIST_VIEW_DELEGATE_H_
+#pragma once
+
+#include "ui/app_list/app_list_export.h"
+
+namespace app_list {
+
+class SearchResult;
+
+class APP_LIST_EXPORT SearchResultListViewDelegate {
+ public:
+  // Invoked to open given |result|. |event_flags| contains the flags of the
+  // keyboard/mouse event that triggers the "open" request. Delegate could use
+  // the |event_flags| information to choose different ways to open the result.
+  virtual void OpenResult(const SearchResult& result,
+                          int event_flags) = 0;
+
+ protected:
+  virtual ~SearchResultListViewDelegate() {}
+};
+
+}  // namespace app_list
+
+#endif  // UI_APP_LIST_SEARCH_RESULT_LIST_VIEW_DELEGATE_H_