Roll src/third_party/devtools-frontend/src 3c5adb7b5fa0..3141e6914c82 (2 commits)

https://chromium.googlesource.com/devtools/devtools-frontend.git/+log/3c5adb7b5fa0..3141e6914c82

git log 3c5adb7b5fa0..3141e6914c82 --date=short --first-parent --format='%ad %ae %s'
2020-05-07 pfaffe@chromium.org Return an error in evaluateVariables when formatters are unavailable
2020-05-07 pfaffe@chromium.org Fix tests after vector->set change

Created with:
  gclient setdep -r src/third_party/devtools-frontend/src@3141e6914c82

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:1020120
Tbr: devtools-waterfall-sheriff-onduty@grotations.appspotmail.com
Change-Id: I54c23117bd94580d6949d00214951b1451581394
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2187521Reviewed-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@{#766371}

DEPS

@@ -249,7 +249,7 @@ 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': '3c5adb7b5fa05ffb61fec42c14719f2086a51ce3',
+  'devtools_frontend_revision': '3141e6914c82df1374f2fe0ba4757e81dd194e9c',
   # 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.