[Media Router] Parse device description xml in utility process

chrome/common/extensions/dial_device_description_parser.typemap

Index: chrome/common/extensions/dial_device_description_parser.typemap
diff --git a/chrome/common/extensions/dial_device_description_parser.typemap b/chrome/common/extensions/dial_device_description_parser.typemap
new file mode 100644
index 0000000000000000000000000000000000000000..c11d43d0d9a03e1ed8a619a3500f420235c73ecf
--- /dev/null
+++ b/chrome/common/extensions/dial_device_description_parser.typemap
@@ -0,0 +1,15 @@
+# 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 = "//chrome/common/extensions/dial_device_description_parser.mojom"
+
+public_headers = [ "//chrome/common/media_router/dial_device_description.h" ]
+
+traits_headers = [ "//chrome/common/extensions/dial_device_description_parser_struct_traits.h" ]
+
+sources = [
+  "//chrome/common/extensions/dial_device_description_parser_struct_traits.cc",
+]
+
+type_mappings = [ "extensions.mojom.DialDeviceDescription=media_router::DialDeviceDescription" ]