Roll src/third_party/devtools-frontend/src 55e502897c6e..6a14c8da7c4d (2 commits)

https://chromium.googlesource.com/devtools/devtools-frontend.git/+log/55e502897c6e..6a14c8da7c4d

git log 55e502897c6e..6a14c8da7c4d --date=short --first-parent --format='%ad %ae %s'
2020-03-11 jacktfranklin@chromium.org Allow third_party DEPs to be exempt from import rules
2020-03-11 tvanderlippe@chromium.org Add e2etest to verify removal of pseudo states works

Created with:
  gclient setdep -r src/third_party/devtools-frontend/src@6a14c8da7c4d

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:1050549
Tbr: devtools-waterfall-sheriff-onduty@grotations.appspotmail.com
Change-Id: I0d060848de576d4344c0ffb6262163d133091183
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2098072Reviewed-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@{#749192}

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': '55e502897c6e408ce3f108e631251e488419a9f7',
+  'devtools_frontend_revision': '6a14c8da7c4d00e6631b01aef693561d591b24d7',
   # 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.