GitLab

* Fix typo
* Introduced Scoped125DSFForUIScaling to temporarily disable it for testing.
* Make sure id isn't invalid when checking if it's internal.
 This problem exists only in unit tests, not in production.

BUG=None

Review URL: https://codereview.chromium.org/1251573006

Cr-Commit-Position: refs/heads/master@{#339822}