Chrome version: 68.0.3416.0 (Official Build) dev (64-bit)
OS: Chrome

Repro steps:
1. Sign in to multiple users on chrome to support fast user switching (ctrl-alt-.)
2. Install Crostini
3. Launch Terminal
4. Pin Terminal to App Shelf
5. Fast Switch to other user (ctrl-alt-.)
6. fast switch back to primary user


Expected: Terminal should still be pinned on App shelf.
Actual: Terminal no longer pinned.