Roll Open Screen from 759af7f40213 to 9be11f7d2b44 (4 revisions)

https://chromium.googlesource.com/openscreen.git/+log/759af7f40213..9be11f7d2b44

2020-11-25 jophba@chromium.org [HOTFIX] remove iOS death tests
2020-11-25 jophba@chromium.org [HOTFIX] Fix flatmap tests on Mac
2020-11-25 jophba@chromium.org Add new FlatMap utility class
2020-11-25 jophba@chromium.org Roll DEPS to latest versions

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/openscreen-chromium
Please CC jophba@chromium.org 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: None
Tbr: jophba@chromium.org
Change-Id: Id381bd7c94d8ab6fa1883b4ac9dd68feb66915a7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2559048Reviewed-by: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Reviewed-by: Jordan Bayles <jophba@chromium.org>
Commit-Queue: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#830922}

DEPS

@@ -1274,7 +1274,7 @@ deps = {
     Var('chromium_git') + '/external/github.com/cisco/openh264' + '@' + '3dd5b80bc4f172dd82925bb259cb7c82348409c5',
 
   'src/third_party/openscreen/src':
-    Var('chromium_git') + '/openscreen' + '@' + '759af7f402131028b48a107ca33d4b1ee2fdaeb6',
+    Var('chromium_git') + '/openscreen' + '@' + '9be11f7d2b44dff83dc88dff054b967a43f319cc',
 
   'src/third_party/openxr/src': {
     'url': Var('chromium_git') + '/external/github.com/KhronosGroup/OpenXR-SDK' + '@' + '97cfe495bb7a3853266b646d1c79e169387f9c7a',