Roll DevTools Frontend from 4d79f96b5ec9 to 20cc9eb2a7f5 (5 revisions)

https://chromium.googlesource.com/devtools/devtools-frontend.git/+log/4d79f96b5ec9..20cc9eb2a7f5

2020-11-19 aerotwist@chromium.org TypeScriptify HeapProfileView.js
2020-11-19 sadym@chromium.org Fix node screenshot. Part 2. DevTools.
2020-11-19 yangguo@chromium.org [ts] Typecheck SourceCodeDiff.js
2020-11-19 janscheffler@chromium.org [Recorder] Add recording to DevTools
2020-11-19 patrick.brosset@microsoft.com Flex: Draw the hatching pattern in empty space of the flex overlay

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:1003629,chromium:1011811,chromium:1139949,chromium:1144127
Tbr: devtools-waterfall-sheriff-onduty@grotations.appspotmail.com
Change-Id: Ia4d3fcd7a8e913281e7a2c2a0494a84aede7cc88
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2550165Reviewed-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@{#829282}

DEPS

@@ -272,7 +272,7 @@ 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': '4d79f96b5ec9e06aa8a518f1f0f576b3c6bd7c0a',
+  'devtools_frontend_revision': '20cc9eb2a7f5203097f688f7b42bca9accfa6e94',
   # 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.