Roll DevTools Frontend from db4f0a699e04 to 2cfcb1c1ee9a (6 revisions)

https://chromium.googlesource.com/devtools/devtools-frontend.git/+log/db4f0a699e04..2cfcb1c1ee9a

2020-11-06 petermarshall@chromium.org [surveys] Add the UI for showing a survey link in IssueView
2020-11-06 tvanderlippe@chromium.org Add copy stacktrace contextmenu option for network initiator
2020-11-06 yiorsi@gmail.com Fix that the previous text will be selected when double-clicking the angle icon
2020-11-06 aerotwist@chromium.org [unit test] Add AccessibilityModel instantiation test
2020-11-06 aerotwist@chromium.org [unit test] Update runtime & env helpers
2020-11-06 alexrudenko@chromium.org Add icons for align-content and remove icons for start/end for now

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/+doc/master/autoroll/README.md

Bug: chromium:1112738,chromium:1139945,chromium:1146401
Tbr: devtools-waterfall-sheriff-onduty@grotations.appspotmail.com
Change-Id: I2669aac8b3dfcd4082af88d2b52e1de5d88ac5e9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2523353


Reviewed-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@{#824914}