Roll DevTools Frontend from be42c94ff748 to 3390f9e7fe5d (2 revisions)

https://chromium.googlesource.com/devtools/devtools-frontend.git/+log/be42c94ff748..3390f9e7fe5d

2020-11-11 jalyn@microsoft.com Settings: Improve display of keyboard shortcuts
2020-11-11 jalyn@microsoft.com Settings: Display category of conflicting shortcuts

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:174309
Tbr: devtools-waterfall-sheriff-onduty@grotations.appspotmail.com
Change-Id: Idce1ffdd59b976c8aabe397319ac5f1155398203
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2533796Reviewed-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@{#826564}

DEPS

@@ -268,7 +268,7 @@ 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': 'be42c94ff748c39bb7558509c27ab6726bc38203',
+  'devtools_frontend_revision': '3390f9e7fe5d5bb9400030fe5f296eb4af4797f0',
   # 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.