Roll DevTools Frontend from 69e28b68cab8 to efd1e44d0df7 (7 revisions)

https://chromium.googlesource.com/devtools/devtools-frontend.git/+log/69e28b68cab8..efd1e44d0df7

2020-10-19 tvanderlippe@chromium.org Remove unstable native heap sampling experiment
2020-10-19 pfaffe@chromium.org TypeScriptify StylesSourceMapping
2020-10-19 pfaffe@chromium.org TypeScriptify DefaultScriptMapping
2020-10-19 tvanderlippe@chromium.org Move remaining legacy files to GN
2020-10-19 alexrudenko@chromium.org Enable TypeScript for TimelineProfileTree.js
2020-10-19 pfaffe@chromium.org TypeScriptify NetworkProject
2020-10-19 alexrudenko@chromium.org Partially revert 'Fix snippet saving and search'

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:1011811,chromium:1043121,chromium:1131500
Tbr: devtools-waterfall-sheriff-onduty@grotations.appspotmail.com
Change-Id: Icacc1f1a877e687fb027489c5a19c476f6fefa69
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2484731Reviewed-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@{#818428}

DEPS

@@ -277,7 +277,7 @@ 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': '69e28b68cab8dc34cdbd8c6ec3503546a57875df',
+  'devtools_frontend_revision': 'efd1e44d0df70569bce663379bdc9d09ffe37a07',
   # 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.