Roll DevTools Frontend from 1b2c5e463ebe to 8514078e455e (2 revisions)

https://chromium.googlesource.com/devtools/devtools-frontend.git/+log/1b2c5e463ebe..8514078e455e

2020-06-18 mathias@chromium.org Avoid pathlib dependency in CSS lint script
2020-06-18 sigurds@chromium.org Remember frameId for DevTools-initiated loads

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:1069378,chromium:1083142
Tbr: devtools-waterfall-sheriff-onduty@grotations.appspotmail.com
Change-Id: I51123517fd0b16e19319b998b256ebc5c28682ee
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2251732Reviewed-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@{#779795}

DEPS

@@ -253,7 +253,7 @@ 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': '1b2c5e463ebeeeb9dfd950e74c94a95225521c02',
+  'devtools_frontend_revision': '8514078e455e2c0819773c5a5b328d5c4e1ce4d9',
   # 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.