Roll src/third_party/devtools-frontend/src 808d9949c3eb..ce38cc10b0ba (2 commits)

https://chromium.googlesource.com/devtools/devtools-frontend.git/+log/808d9949c3eb..ce38cc10b0ba

git log 808d9949c3eb..ce38cc10b0ba --date=short --first-parent --format='%ad %ae %s'
2019-12-10 yangguo@chromium.org Sync webtests with upstream
2019-12-10 yangguo@chromium.org Roll upstream changes

Created with:
  gclient setdep -r src/third_party/devtools-frontend/src@ce38cc10b0ba

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: None
Tbr: devtools-waterfall-sheriff-onduty@grotations.appspotmail.com
Change-Id: I405215839aef7f9794b10741dc5b986a3cea953b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1960385Reviewed-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@{#723345}

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': '808d9949c3eb212b6830ba773cf982aee4fb126b',
+  'devtools_frontend_revision': 'ce38cc10b0ba37e135a9a5ced349a1437f228a15',
   # 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.