Roll src/third_party/devtools-frontend/src 33997f3d931a..64e0899efa07 (2 commits)

https://chromium.googlesource.com/devtools/devtools-frontend.git/+log/33997f3d931a..64e0899efa07

git log 33997f3d931a..64e0899efa07 --date=short --first-parent --format='%ad %ae %s'
2020-03-19 mjackson@microsoft.com Avoid automatically reloading DevTools on Theme change
2020-03-19 devtools-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com Update DevTools Chromium DEPS.

Created with:
  gclient setdep -r src/third_party/devtools-frontend/src@64e0899efa07

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:1001549
Tbr: devtools-waterfall-sheriff-onduty@grotations.appspotmail.com
Change-Id: Ia73dc166bc529a025c7dc85cb87e3ed887c1b3e5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2109612Reviewed-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@{#751615}

DEPS

@@ -246,7 +246,7 @@ 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': '33997f3d931a881e2675a19417b1980ad92a40cc',
+  'devtools_frontend_revision': '64e0899efa07a281ed44288cf6fab12e83e47f8a',
   # 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.