Roll DevTools Frontend from 71b08cd277f4 to 9c946ee14364 (7 revisions)

https://chromium.googlesource.com/devtools/devtools-frontend.git/+log/71b08cd277f4..9c946ee14364

2020-09-21 tvanderlippe@chromium.org Remove is_web_worker from formatter_worker implementation
2020-09-21 liaoyuke@chromium.org Make devtools work for non-default toolchains
2020-09-21 andoli@chromium.org [ts] Typecheck components/JSPresentationUtils.js with TypeScript
2020-09-21 tvanderlippe@chromium.org Move message handling of worker into formatter_worker.ts
2020-09-21 andoli@chromium.org [ts] Typecheck components/Reload.js with TypeScript
2020-09-21 tvanderlippe@chromium.org Remove autocompletion for box-shadow
2020-09-21 mmocny@chromium.org Extract Layout Shifts from all Renderer processes & its subframes

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:1011811,chromium:1129223,chromium:1130583
Tbr: devtools-waterfall-sheriff-onduty@grotations.appspotmail.com
Change-Id: I205841e6df9e5dd8369c1ed0327dba99cd83df03
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2422304Reviewed-by: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Commit-Queue: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#809010}

DEPS

@@ -266,7 +266,7 @@ vars = {
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling devtools-frontend
   # and whatever else without interference from each other.
-  'devtools_frontend_revision': '71b08cd277f47510c2e4ed24e410cc1171e8dc88',
+  'devtools_frontend_revision': '9c946ee143640ec431d6eddd1ff9d46239d08770',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling libprotobuf-mutator
   # and whatever else without interference from each other.