message: Disable -Wunguarded-availability for apprtc_signaling.
  Cr-Commit-Position: refs/heads/master@{#28702}
diff: @@ -212,6 +212,11 @@ if (is_ios || (is_mac && target_cpu != "x86")) {
  config("apprtc_signaling_config") {
  include_dirs = [ "objc/AppRTCMobile" ]
  + cflags_objc = [
  + # TODO(bugs.webrtc.org/10837): Remove this when usage of
  + # archivedDataWithRootObject will be removed.
  + "-Wno-unguarded-availability",
  + ]
  }
  rtc_static_library("apprtc_signaling") {
  