Roll src/third_party/devtools-frontend/src 6f790e4528b7..738d06da1f6f (4 commits)

https://chromium.googlesource.com/devtools/devtools-frontend.git/+log/6f790e4528b7..738d06da1f6f

git log 6f790e4528b7..738d06da1f6f --date=short --first-parent --format='%ad %ae %s'
2019-12-05 devtools-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com Update Devtools DEPS.
2019-12-04 brcui@microsoft.com Enable Interaction with Device Toolbar while Settings dialog is open
2019-12-04 michael.liao@microsoft.com DevTools [Layers]: Adding ARIA Labels
2019-12-04 michael.liao@microsoft.com [Sources]: Changing placeholder list accessible name

Created with:
  gclient setdep -r src/third_party/devtools-frontend/src@738d06da1f6f

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:963183
Tbr: devtools-waterfall-sheriff-onduty@grotations.appspotmail.com
Change-Id: Id6a3e481d423a5575c7332b8ed4c10073e08df58
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1952386Reviewed-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@{#721859}

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': '6f790e4528b7c22d1708c00e45e62b05c5f6e039',
+  'devtools_frontend_revision': '738d06da1f6ff615b12ea97b97cdaa6279b893c5',
   # 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.