Roll src/third_party/devtools-frontend/src d9a5b6e2c1d2..e7fcd7dde1d9 (2 commits)

https://chromium.googlesource.com/devtools/devtools-frontend.git/+log/d9a5b6e2c1d2..e7fcd7dde1d9

git log d9a5b6e2c1d2..e7fcd7dde1d9 --date=short --first-parent --format='%ad %ae %s'
2020-02-26 aerotwist@chromium.org Reland "[e2e] Add user metrics tests"
2020-02-26 tvanderlippe@chromium.org Remove tsbuildinfo files from ts_library outputs

Created with:
  gclient setdep -r src/third_party/devtools-frontend/src@e7fcd7dde1d9

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:1044632,chromium:1053887
Tbr: devtools-waterfall-sheriff-onduty@grotations.appspotmail.com
Change-Id: I5edb8a6a513e7ad7bc1329bd0798df872e478d02
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2076322Reviewed-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@{#744880}

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': 'd9a5b6e2c1d257c72b1ea825b8dd404c9e43e8df',
+  'devtools_frontend_revision': 'e7fcd7dde1d9b54088642919c6d5e47426f62d04',
   # 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.