Roll src/third_party/devtools-frontend/src 537ed8164e47..1e74ce74a9fa (3 commits)

https://chromium.googlesource.com/devtools/devtools-frontend.git/+log/537ed8164e47..1e74ce74a9fa

git log 537ed8164e47..1e74ce74a9fa --date=short --first-parent --format='%ad %ae %s'
2020-02-07 tvanderlippe@chromium.org Add e2etest for Last-Modified parsing in network tab
2020-02-07 devtools-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com Update DevTools DEPS.
2020-02-07 yangguo@chromium.org chmod +x scripts/test/run_e2e.py

Created with:
  gclient setdep -r src/third_party/devtools-frontend/src@1e74ce74a9fa

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:1047671
Tbr: devtools-waterfall-sheriff-onduty@grotations.appspotmail.com
Change-Id: I1f25d3079da38cdf91350554e1a0bfd179e98b2f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2043917Reviewed-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@{#739379}

DEPS

@@ -242,7 +242,7 @@ 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': '537ed8164e479dfaaceec5c81fbaa3a79eeb3239',
+  'devtools_frontend_revision': '1e74ce74a9faea50816bd0088c17a41486e60441',
   # 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.