Elim ActivateAppListItem, ChromeAppListItem

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 e9675a83ee1d0aaf10daa8fa5e0945351931048f..1defc5a557f8eb8927713faf6c88c588178213f4 100644
--- a/ui/app_list/app_list_item_model.h
+++ b/ui/app_list/app_list_item_model.h
@@ -51,6 +51,15 @@ class APP_LIST_EXPORT AppListItemModel {
   void AddObserver(AppListItemModelObserver* observer);
   void RemoveObserver(AppListItemModelObserver* observer);
 
+  // Returns a string identifier for the subclass (defaults to "").
+  virtual std::string AppType() const;
+
+  // Activates (opens) the item. Does nothing by default.
+  virtual void Activate(int event_flags);
+
+  // Updates the item (called when the model may have changed).
+  virtual void Update();
+
   // Returns the context menu model for this item, or NULL if there is currently
   // no menu for the item (e.g. during install).
   // Note the returned menu model is owned by this item.