[Media Router] Add MediaSink subtypes

net/dns/mojo_host_struct_traits.cc

Index: net/dns/mojo_host_struct_traits.cc
diff --git a/net/dns/mojo_host_struct_traits.cc b/net/dns/mojo_host_struct_traits.cc
index 09f167323a1761fd92b6977256f3ab867f8d10f9..ba543ad9b58b1a5dabb00a61aa6bd956549241ff 100644
--- a/net/dns/mojo_host_struct_traits.cc
+++ b/net/dns/mojo_host_struct_traits.cc
@@ -69,6 +69,18 @@ bool StructTraits<net::interfaces::HostResolverRequestInfoDataView,
 }
 
 // static
+bool StructTraits<net::interfaces::IPAddressDataView, net::IPAddress>::Read(
+    net::interfaces::IPAddressDataView data,
+    net::IPAddress* out) {
+  std::vector<uint8_t> bytes;
+  if (!data.ReadAddress(&bytes))
+    return false;
+
+  *out = net::IPAddress(bytes);
+  return true;
+}
+
+// static
 bool StructTraits<net::interfaces::IPEndPointDataView, net::IPEndPoint>::Read(
     net::interfaces::IPEndPointDataView data,
     net::IPEndPoint* out) {