Roll DevTools Frontend from 468417610753 to 7c54d0e3efb6 (3 revisions)

https://chromium.googlesource.com/devtools/devtools-frontend.git/+log/468417610753..7c54d0e3efb6

2021-01-07 wolfi@chromium.org Add ignoreListJSFramesOnTimeline experiment
2021-01-07 tvanderlippe@chromium.org Update CodeMirror to 5.59.1
2021-01-07 jacktfranklin@chromium.org Migrate component docs data grid example to TS file

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:1144106,chromium:1161439
Tbr: devtools-waterfall-sheriff-onduty@grotations.appspotmail.com
Change-Id: I8c8da1e21b8765b1b7125fc4fc0a6da901420e77
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2614471Reviewed-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@{#841038}

DEPS

@@ -274,7 +274,7 @@ 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': '468417610753a346e480b92b561bc07da0835e01',
+  'devtools_frontend_revision': '7c54d0e3efb6e9c67069830f195d109dedb6e60d',
   # 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.