Elim ActivateAppListItem, ChromeAppListItem

ui/app_list/test/app_list_test_model.h

Index: ui/app_list/test/app_list_test_model.h
diff --git a/ui/app_list/test/app_list_test_model.h b/ui/app_list/test/app_list_test_model.h
index decd907140303bc8dcf7fc928d106fa7c5154137..c0f9c0f7674158fb66ff9007421be55ceee9992b 100644
--- a/ui/app_list/test/app_list_test_model.h
+++ b/ui/app_list/test/app_list_test_model.h
@@ -42,7 +42,17 @@ class AppListTestModel : public AppListModel {
   // Call SetHighlighted on the specified item.
   void HighlightItemAt(int index);
 
+  int activate_count() { return activate_count_; }
+  AppListItemModel* last_activated() { return last_activated_; }
+
  private:
+  class AppListTestItemModel;
+
+  void ItemActivated(AppListTestItemModel* item);
+
+  int activate_count_;
+  AppListItemModel* last_activated_;
+
   DISALLOW_COPY_AND_ASSIGN(AppListTestModel);
 };