Roll src/third_party/openscreen/src/ 729798cc3..21b5adc84 (19 commits; 5 trivial rolls)

https://chromium.googlesource.com/openscreen/+log/729798cc3be6..21b5adc8409a

$ git log 729798cc3..21b5adc84 --date=short --no-merges --format='%ad %ae %s'
2019-10-25 jophba Fix chrome build, add unit testing in Chrome
2019-11-06 mfoltz [Open Screen] Consolidate BUILD.gn for cast/
2019-11-05 mfoltz Roll buildtools/ cf454b247..140e4d7c4 (2 commits; 1 trivial rolls)
2019-11-05 mfoltz [Open Screen] Move mDNS code to discovery/mdns.
2019-11-05 btolsch Add virtual connections for cast socket
2019-11-05 rwkeane DNS-SD: Add new TxtRecord method
2019-11-05 rwkeane DNS-SD: More Conversions
2019-10-31 rwkeane DNS-SD: Conversions From mDNS
2019-10-30 rwkeane DnsSd: Querier Skeleton
2019-10-29 yakimakha MdnsService base interface
2019-10-25 miu Cast Streaming: Add RTP Payload Type hacks for AndroidTV.
2019-10-25 rwkeane DNS-SD: TxtRecord implementation
2019-10-25 rwkeane DnsSd: More Operators for Constants
2019-10-24 rwkeane DNS-SD: Instance Record

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

Change-Id: I64f4e8d5ac63657c1bac61d012321c80c5f90b7e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1906125Reviewed-by: Dirk Pranke <dpranke@chromium.org>
Reviewed-by: mark a. foltz <mfoltz@chromium.org>
Commit-Queue: Jordan Bayles <jophba@chromium.org>
Cr-Commit-Position: refs/heads/master@{#714697}

DEPS

@@ -1266,7 +1266,7 @@ deps = {
     Var('chromium_git') + '/external/github.com/cisco/openh264' + '@' + '6f26bce0b1c4e8ce0e13332f7c0083788def5fdf',
 
   'src/third_party/openscreen/src':
-    Var('chromium_git') + '/openscreen' + '@' + '729798cc3be6c945eb7ec4b3cf10e027397b6ca7',
+    Var('chromium_git') + '/openscreen' + '@' + '21b5adc8409a64f7902bda4f8e690a42f949395f',
 
   'src/third_party/openxr/src': {
     'url': Var('chromium_git') + '/external/github.com/KhronosGroup/OpenXR-SDK' + '@' + '46d7cb392019e934e2944bdd317be8ed5176b3f2',

chrome/browser/media/router/BUILD.gn

@@ -164,7 +164,7 @@ static_library("router") {
       ]
 
       configs +=
-          [ "//third_party/openscreen/src/build:allow_build_from_embedder" ]
+          [ "//third_party/openscreen/src/build:openscreen_include_dirs" ]
 
       deps += [
         "//third_party/openscreen/src/osp/public",

third_party/abseil-cpp/absl/hash/BUILD.gn

@@ -13,6 +13,7 @@ import("//third_party/abseil-cpp/abseil_clients.gni")
 # https://docs.google.com/document/d/1DgS1-A3rzboTLjpf4m1sqkJgWjnY_Ru2dokk1X1vBDU
 if (build_with_chromium) {
   visibility = absl_visibility
+  visibility += [ "//third_party/openscreen/*" ]
 } else {
   visibility = [ "*" ]
 }