GitLab

FirstRunDelayedExtensionUpdater used NOTIFICATION_PROFILE_CREATED to
tell the first created profile's ExtensionSystem to run an update as
soon as it was ready. Instead, set a (static) flag in ExtensionUpdater
to do the same for the first ExtensionUpdater that is brought up.

Bug: 268984
Change-Id: I82e113c45a5f77954c4674460e2b0582d78dfcfd
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1798887Reviewed-by: Devlin <rdevlin.cronin@chromium.org>
Reviewed-by: Avi Drissman <avi@chromium.org>
Commit-Queue: Avi Drissman <avi@chromium.org>
Auto-Submit: Evan Stade <estade@chromium.org>
Cr-Commit-Position: refs/heads/master@{#700489}