Drag and drop between app list and launcher - First patch

ui/app_list/app_list_item_model.h

Index: ui/app_list/app_list_item_model.h
diff --git a/ui/app_list/app_list_item_model.h b/ui/app_list/app_list_item_model.h
index d0acd765848949e7f6fc743f11300bc40edab823..d437564ef7526a0560344a8a2740c1ef9305332c 100644
--- a/ui/app_list/app_list_item_model.h
+++ b/ui/app_list/app_list_item_model.h
@@ -43,6 +43,9 @@ class APP_LIST_EXPORT AppListItemModel {
   void SetPercentDownloaded(int percent_downloaded);
   int percent_downloaded() const { return percent_downloaded_; }
 
+  void set_app_id(const std::string& app_id) { app_id_ = app_id; }
+  const std::string& app_id() { return app_id_; }
+
   void AddObserver(AppListItemModelObserver* observer);
   void RemoveObserver(AppListItemModelObserver* observer);
 
@@ -57,6 +60,7 @@ class APP_LIST_EXPORT AppListItemModel {
   bool highlighted_;
   bool is_installing_;
   int percent_downloaded_;
+  std::string app_id_;
 
   ObserverList<AppListItemModelObserver> observers_;