ash: Add support for additional icons in apps search list.

ui/app_list/app_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_APP_LIST_VIEW_DELEGATE_H_
 #define UI_APP_LIST_APP_LIST_VIEW_DELEGATE_H_
 
 #include "ui/app_list/app_list_export.h"
 
 namespace app_list {
@@ skipping 20 matching lines @@
   // of AppListModel.
   virtual void StartSearch() = 0;
 
   // Invoked to stop the current search.
   virtual void StopSearch() = 0;
 
   // Invoked to open the search result.
   virtual void OpenSearchResult(const SearchResult& result,
                                 int event_flags) = 0;
 
+  // Called to invoke a custom action on |result|.  |action_index| corresponds
+  // to the index of an icon in |result.action_icons()|.
+  virtual void InvokeSearchResultAction(const SearchResult& result,
+                                        int action_index,
+                                        int event_flags) = 0;
+
   // Invoked to close app list.
   virtual void Close() = 0;
 };
 
 }  // namespace app_list
 
 #endif  // UI_APP_LIST_APP_LIST_VIEW_DELEGATE_H_