Trim whitespace at DM token initialization.

Since testing special DM token values like INVALID_DM_TOKEN may require
manually setting the DM token this makes it safer, otherwise the editor
might add extra useless whitespace and mess with testing.

Change-Id: I50ceafe7fa03d39c0ea8e24f80418805f3d8639a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1913871
Reviewed-by: Julian Pastarmov <pastarmovj@chromium.org>
Commit-Queue: Dominique Fauteux-Chapleau <domfc@chromium.org>
Cr-Commit-Position: refs/heads/master@{#715249}
3 files changed