Roll DevTools Frontend from b85a296d6a61 to 1ff270d3e636 (3 revisions)

https://chromium.googlesource.com/devtools/devtools-frontend.git/+log/b85a296d6a61..1ff270d3e636

2020-06-22 mathias@chromium.org Fix typo in link to triage guidelines
2020-06-22 patrick.brosset@microsoft.com Enable the no-return-assign ESLint rule
2020-06-22 petermarshall@chromium.org Update CDP

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:1084558,chromium:1093379
Tbr: devtools-waterfall-sheriff-onduty@grotations.appspotmail.com
Change-Id: Ie326de87cbea0e1664d7327a5fce6996ebf00ed7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2257045Reviewed-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@{#780731}

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': 'b85a296d6a61605ecbacd83d847ba49afb98b600',
+  'devtools_frontend_revision': '1ff270d3e636bc2424d400ae87b00eedb3800af0',
   # 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.