Roll DevTools Frontend from 2b1513dc094d to 5dec87fb9844 (5 revisions)

https://chromium.googlesource.com/devtools/devtools-frontend.git/+log/2b1513dc094d..5dec87fb9844

2020-11-12 jec@google.com Update What's New UI for Chrome 88
2020-11-12 changhaohan@chromium.org Fix <angle> keydown issue
2020-11-12 alexrudenko@chromium.org Clear label container in reset()
2020-11-12 szuend@chromium.org [issues] Introduce substitutions in markdown issue descriptions
2020-11-12 tonykostowny@gmail.com Support expanding uppercased shorthand CSS properties

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:1125465,chromium:1148183
Tbr: devtools-waterfall-sheriff-onduty@grotations.appspotmail.com
Change-Id: I91d175d0f98df227ce56db8680a89b883370d2f2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2533972Reviewed-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@{#826733}

DEPS

@@ -272,7 +272,7 @@ 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': '2b1513dc094d7008a6d3e3f719e5901604827b9f',
+  'devtools_frontend_revision': '5dec87fb9844d30cc7f98e05843f797c71d2eeae',
   # 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.