Roll src/third_party/devtools-frontend/src b12649462ca2..df2dbba832ad (3 commits)

https://chromium.googlesource.com/devtools/devtools-frontend.git/+log/b12649462ca2..df2dbba832ad

git log b12649462ca2..df2dbba832ad --date=short --first-parent --format='%ad %ae %s'
2020-01-30 leese@chromium.org Check for wasm disassembly before inline script
2020-01-30 szuend@chromium.org Add 'skipFirstWait' argument to breakpoint decoration test helper
2020-01-30 kayce@google.com Update the What's New UI for Chrome 81

Created with:
  gclient setdep -r src/third_party/devtools-frontend/src@df2dbba832ad

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:1045573,chromium:986998
Tbr: devtools-waterfall-sheriff-onduty@grotations.appspotmail.com
Change-Id: If8ee0f39ec0c67488c8f9686e1b68f452beffa78
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2030041Reviewed-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@{#736799}

DEPS

@@ -248,7 +248,7 @@ 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': 'b12649462ca20d64307168e99fe162b87014d984',
+  'devtools_frontend_revision': 'df2dbba832adc94dcd0d2f8d4a2ca9e768b91a4a',
   # 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.