Roll DevTools Frontend from 3dc032a7f76a to dc473b103b0a (7 revisions)

https://chromium.googlesource.com/devtools/devtools-frontend.git/+log/3dc032a7f76a..dc473b103b0a

2020-07-29 mathias@chromium.org Revert "Migrate `front_end/toolbox_bootstrap` to `devtools_entrypoint`"
2020-07-28 joselea@microsoft.com Unify panelShown telemetry logic
2020-07-28 janscheffler@chromium.org Migrate `front_end/persistence` to `devtools_entrypoint`
2020-07-28 janscheffler@chromium.org Move devices to devtools_entrypoint
2020-07-28 janscheffler@chromium.org Migrate `front_end/css_overview` to `devtools_entrypoint`
2020-07-28 janscheffler@chromium.org Migrate `front_end/performance_monitor` to `devtools_entrypoint`
2020-07-28 janscheffler@chromium.org Migrate `front_end/toolbox_bootstrap` to `devtools_entrypoint`

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:1075732,chromium:1101738
Tbr: devtools-waterfall-sheriff-onduty@grotations.appspotmail.com
Change-Id: Iaa03f1ada07fa228f6a59c6ff0857bb1eb631c8b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2325560
Reviewed-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@{#792601}