Roll DevTools Frontend from f18c0ac2f735 to 50e7bb530903 (1 revision)

https://chromium.googlesource.com/devtools/devtools-frontend.git/+log/f18c0ac2f735..50e7bb530903

2020-06-19 joselea@microsoft.com DevTools personalization - Make Security tab closeable

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:1074732
Tbr: devtools-waterfall-sheriff-onduty@grotations.appspotmail.com
Change-Id: I7c9e849593b6811f631686e5495677343f807844
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2254724Reviewed-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@{#780452}

DEPS

@@ -253,7 +253,7 @@ 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': 'f18c0ac2f735bd0b1385398c7e52b8ba01a5d796',
+  'devtools_frontend_revision': '50e7bb5309031ad5f8937c6332b15cee1f0f7a04',
   # 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.