Roll src/third_party/openscreen/src/ af60f6295..d0f315b3f (14 commits)

https://chromium.googlesource.com/openscreen/+log/af60f62955c6..d0f315b3fac8

$ git log af60f6295..d0f315b3f --date=short --no-merges --format='%ad %ae %s'
2019-10-16 jophba Rename task_runner to GetTaskRunner
2019-10-14 mfoltz [Open Screen] Add linux64_gcc_debug  to the LUCI waterfall page.
2019-10-15 jophba Change JsonCpp reader to use strict mode
2019-10-15 btolsch Add cast sender socket factory
2019-10-10 jophba Add Mac OS X ScopedWakeLock implementation
2019-10-14 mfoltz [Open Screen] Final round of gcc fixes.
2019-10-02 jophba Add frame agent config files
2019-10-11 mfoltz [Open Screen] Fix gcc build errors in osp/impl/discovery/mdns
2019-10-11 rwkeane PlatformClient: Use In Existing Classes
2019-10-11 mfoltz [Open Screen] Remove CDDL compiler dependencies on platform/.
2019-10-10 mfoltz [Open Screen] BUILD cleanups.
2019-10-11 rwkeane TcpSocket: Implement TlsWriteBuffer
2019-10-10 rwkeane PlatformClient: Add Threading Support
2019-10-10 mfoltz Use recursive deps for buildtools/.

Created with:
  roll-dep src/third_party/openscreen/src

Change-Id: Ie4bfe652f32e9fc2e55003da894a6759c957c335
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1865041Reviewed-by: mark a. foltz <mfoltz@chromium.org>
Commit-Queue: Jordan Bayles <jophba@chromium.org>
Cr-Commit-Position: refs/heads/master@{#707049}

DEPS

@@ -1252,7 +1252,7 @@ deps = {
     Var('chromium_git') + '/external/github.com/cisco/openh264' + '@' + '6f26bce0b1c4e8ce0e13332f7c0083788def5fdf',
 
   'src/third_party/openscreen/src':
-    Var('chromium_git') + '/openscreen' + '@' + 'af60f62955c6101bbc4223f30e7685a824369058',
+    Var('chromium_git') + '/openscreen' + '@' + 'd0f315b3fac883c1e34c1ea2d768118efeffb3bc',
 
   'src/third_party/openxr/src': {
     'url': Var('chromium_git') + '/external/github.com/KhronosGroup/OpenXR-SDK' + '@' + '46d7cb392019e934e2944bdd317be8ed5176b3f2',