Roll DevTools Frontend from 5166fad523bf to 1e6a1e2ee228 (3 revisions)

https://chromium.googlesource.com/devtools/devtools-frontend.git/+log/5166fad523bf..1e6a1e2ee228

2021-03-04 petermarshall@chromium.org [l10n] Add checks for ICU plural format in collect-strings
2021-03-04 devtools-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com Update DevTools DEPS.
2021-03-04 jacktfranklin@chromium.org [Theme Colors] exempt var(--image-file-*) from rule

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 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/master/autoroll/README.md

Bug: chromium:1163928
Tbr: devtools-waterfall-sheriff-onduty@grotations.appspotmail.com
Change-Id: Iff4e1ac4d63391004d4698acee0c4798ecb71b3f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2735177
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/master@{#859753}