Roll src/third_party/devtools-frontend/src 2ced406be1ce..c839d063efb6 (4 commits)

https://chromium.googlesource.com/devtools/devtools-frontend.git/+log/2ced406be1ce..c839d063efb6

git log 2ced406be1ce..c839d063efb6 --date=short --first-parent --format='%ad %ae %s'
2020-04-01 wolfi@chromium.org Round design for logpoint icon
2020-04-01 aerotwist@chromium.org [Experience] Adds layout shifts to performance timeline
2020-04-01 aerotwist@chromium.org [e2e] Fix selection after delete
2020-04-01 leese@chromium.org Show unbound breakpoints as disabled

Created with:
  gclient setdep -r src/third_party/devtools-frontend/src@c839d063efb6

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/+/master/autoroll/README.md

Bug: chromium:1041830,chromium:1054381,chromium:1054447
Tbr: devtools-waterfall-sheriff-onduty@grotations.appspotmail.com
Change-Id: Ia9019fa5e5b81e02624a49ab6838b1b4e0c45c05
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2132166Reviewed-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@{#755333}

DEPS

@@ -246,7 +246,7 @@ 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': '2ced406be1ce22cbfbbe9ae135e73ed172eab95e',
+  'devtools_frontend_revision': 'c839d063efb6c28d46c266aa695e4157139a605d',
   # 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.