[net] Add a typemap for net::IPAddress

net/interfaces/ip_address.typemap

Index: net/interfaces/ip_address.typemap
diff --git a/net/interfaces/ip_address.typemap b/net/interfaces/ip_address.typemap
new file mode 100644
index 0000000000000000000000000000000000000000..64488d6b45f820d1872a1832c46c10745c9fed57
--- /dev/null
+++ b/net/interfaces/ip_address.typemap
@@ -0,0 +1,14 @@
+# 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.
+
+mojom = "//net/interfaces/ip_address.mojom"
+public_headers = [ "//net/base/ip_address.h" ]
+traits_headers = [ "//net/interfaces/ip_address_struct_traits.h" ]
+sources = [
+  "//net/interfaces/ip_address_struct_traits.cc",
+]
+type_mappings = [ "net.interfaces.IPAddress=net::IPAddress" ]
+public_deps = [
+  "//net",
+]