Roll src/third_party/devtools-frontend/src d605957919ad..209a6444a270 (5 commits)

https://chromium.googlesource.com/devtools/devtools-frontend.git/+log/d605957919ad..209a6444a270

git log d605957919ad..209a6444a270 --date=short --first-parent --format='%ad %ae %s'
2020-04-23 wolfi@chromium.org Update protocol
2020-04-23 szuend@chromium.org [issues] Add test for de-duplication of cookies in AggregatedIssue
2020-04-23 janscheffler@chromium.org Add regression test for layers
2020-04-23 jacktfranklin@chromium.org assert.equal => assert.strictEqual
2020-04-23 bmeurer@chromium.org [CodeMirror] roll CodeMirror to 5.53.2

Created with:
  gclient setdep -r src/third_party/devtools-frontend/src@209a6444a270

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/+/master/autoroll/README.md

Bug: chromium:1042721
Tbr: devtools-waterfall-sheriff-onduty@grotations.appspotmail.com
Change-Id: I476869145ef189b8afa89c8f79abd6fbf1488cc9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2162687Reviewed-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@{#761898}

DEPS

@@ -246,7 +246,7 @@ 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': 'd605957919ad6b786205f15706d23bfb0f3ce844',
+  'devtools_frontend_revision': '209a6444a2700c942d0351d082e50f8788ec955d',
   # 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.