Roll src/third_party/devtools-frontend/src 8987f8f14e92..347030813829 (2 commits)

https://chromium.googlesource.com/devtools/devtools-frontend.git/+log/8987f8f14e92..347030813829

git log 8987f8f14e92..347030813829 --date=short --first-parent --format='%ad %ae %s'
2020-01-06 tvanderlippe@chromium.org Migrate worker_main/ to ESM
2020-01-06 tvanderlippe@chromium.org Migrate toolbox_bootstrap/ to ESM

Created with:
  gclient setdep -r src/third_party/devtools-frontend/src@347030813829

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:1006759
Tbr: devtools-waterfall-sheriff-onduty@grotations.appspotmail.com
Change-Id: I8d9eb3b37456ddb3027d4470fae8476c878f99e8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1987935Reviewed-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@{#728519}

DEPS

@@ -252,7 +252,7 @@ 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': '8987f8f14e92c80263e1507f5e118870e169fc1b',
+  'devtools_frontend_revision': '347030813829506eba81720bf3a9399930ea5c06',
   # 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.