Convert gr-change-actions_test to typescript

Change-Id: I1edf170a2bf5cfacabdcc8a2a07e71a12886ff3a

polygerrit-ui/app/elements/change/gr-change-actions/gr-change-actions.ts

diff --git a/polygerrit-ui/app/elements/change/gr-change-actions/gr-change-actions.ts b/polygerrit-ui/app/elements/change/gr-change-actions/gr-change-actions.ts
index 4ae3c68..9199cea 100644
--- a/polygerrit-ui/app/elements/change/gr-change-actions/gr-change-actions.ts
+++ b/polygerrit-ui/app/elements/change/gr-change-actions/gr-change-actions.ts
@@ -111,6 +111,7 @@
   RevisionActions,
 } from '../../../api/change-actions';
 import {ErrorCallback} from '../../../api/rest';
+import {GrDropdown} from '../../shared/gr-dropdown/gr-dropdown';
 
 const ERR_BRANCH_EMPTY = 'The destination branch can’t be empty.';
 const ERR_COMMIT_EMPTY = 'The commit message can’t be empty.';
@@ -274,7 +275,7 @@
   ChangeActions.UNREVIEWED,
 ];
 
-function assertUIActionInfo(action?: ActionInfo): UIActionInfo {
+export function assertUIActionInfo(action?: ActionInfo): UIActionInfo {
   // TODO(TS): Remove this function. The gr-change-actions adds properties
   // to existing ActionInfo objects instead of creating a new objects. This
   // function checks, that 'action' has all property required by UIActionInfo.
@@ -332,6 +333,8 @@
     createFollowUpChange: GrCreateChangeDialog;
     confirmDeleteDialog: GrDialog;
     confirmDeleteEditDialog: GrDialog;
+    moreActions: GrDropdown;
+    secondaryActions: HTMLElement;
   };
 }