Roll src/third_party/devtools-frontend/src 4b6d9afe2055..f9c33d61a661 (2 commits)

https://chromium.googlesource.com/devtools/devtools-frontend.git/+log/4b6d9afe2055..f9c33d61a661

git log 4b6d9afe2055..f9c33d61a661 --date=short --first-parent --format='%ad %ae %s'
2019-12-06 mathias@chromium.org Fix alignment for computed accessibility properties
2019-12-06 mathias@chromium.org Drop -webkit-user-select in favor of user-select

Created with:
  gclient setdep -r src/third_party/devtools-frontend/src@f9c33d61a661

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:1031441,chromium:1031475
Tbr: devtools-waterfall-sheriff-onduty@grotations.appspotmail.com
Change-Id: I823b001afc8ebc66edbb6498d9237c1d1538d24c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1955466Reviewed-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@{#722445}

DEPS

@@ -243,7 +243,7 @@ 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': '4b6d9afe2055aea3480214b3c0a25ea19870e4af',
+  'devtools_frontend_revision': 'f9c33d61a6613c452ef5769a88d8d412880ff821',
   # 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.