GitLab

No product code changes, just updating comments, and removing TODOs.

Explainer: https://github.com/MicrosoftEdge/MSEdgeExplainers/blob/master/RunOnLogin/Explainer.md
I2P: https://groups.google.com/a/chromium.org/forum/#!msg/blink-dev/T6d2zqF_jpw/76TP7Bc2DwAJ

Bug: 897302
Change-Id: Id8f1a8e9bfbb3435f3b653d6b9a587279b401fc7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2637265Reviewed-by: Chase Phillips <cmp@chromium.org>
Commit-Queue: Mike Jackson <mjackson@microsoft.com>
Cr-Commit-Position: refs/heads/master@{#845320}