GitLab

This removes some usage of "association" terminology, which is a concept
that doesn't exist anymore. It also adds a few TODOs for further
"proper" cleanups.

Bug: 1102837
Change-Id: Ib628ff6c065ec532065d3c053d0cc7594e7bbd4d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2539912Reviewed-by: Jan Krcal <jkrcal@chromium.org>
Commit-Queue: Marc Treib <treib@chromium.org>
Cr-Commit-Position: refs/heads/master@{#827755}