[net] Add a typemap for net::IPAddress

net/interfaces/ip_address_struct_traits.cc

Index: net/interfaces/ip_address_struct_traits.cc
diff --git a/net/interfaces/ip_address_struct_traits.cc b/net/interfaces/ip_address_struct_traits.cc
new file mode 100644
index 0000000000000000000000000000000000000000..b23ac880cb0043e05569ce9b5b826ecd77953607
--- /dev/null
+++ b/net/interfaces/ip_address_struct_traits.cc
@@ -0,0 +1,20 @@
+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "net/interfaces/ip_address_struct_traits.h"
+
+namespace mojo {
+// 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 out->IsValid();
+}
+
+}  // namespace mojo