Roll DevTools Frontend from 83ff4630830f to 52ef6318d4c1 (4 revisions)

https://chromium.googlesource.com/devtools/devtools-frontend.git/+log/83ff4630830f..52ef6318d4c1

2021-09-07 wolfi@chromium.org [devtools] Reorganize not-restored reasons in DevTools
2021-09-07 devtools-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com Update DevTools DEPS.
2021-09-07 tvanderlippe@chromium.org Load emulated_devices images using relative URL
2021-09-07 victorporof@chromium.org Remove inspector scrollbars CSS file from the build system

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/devtools-frontend-chromium
Please CC devtools-waterfall-sheriff-onduty@grotations.appspotmail.com on the revert to ensure that a human
is aware of the problem.

To file a bug in Chromium: https://bugs.chromium.org/p/chromium/issues/entry

To report a problem with the AutoRoller itself, please file a bug:
https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md

Bug: chromium:1110752,chromium:1245518,chromium:1246446
Tbr: devtools-waterfall-sheriff-onduty@grotations.appspotmail.com
Change-Id: Ib20e28f273c38ace0512690966d8b7422803bed4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3144707
Commit-Queue: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Bot-Commit: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/main@{#918795}