message: fix(upgrade): Prevent property renaming for $inject.
  Switch to bracket notation for `directiveFactory.$inject`, otherwise Closure Compiler will (property) rename it, since the output type is `any`.
diff: @@ -124,7 +124,8 @@ export function downgradeComponent(info: /* ComponentInfo */ {
  };
  };
  - directiveFactory.$inject = [$COMPILE, $INJECTOR, $PARSE];
  + // bracket-notation because of closure - see #14441
  + directiveFactory['$inject'] = [$COMPILE, $INJECTOR, $PARSE];
  return directiveFactory;
  }
  