[Media Router] Add MediaSink subtypes

chrome/browser/media/router/mojo/media_router.mojom

Index: chrome/browser/media/router/mojo/media_router.mojom
diff --git a/chrome/browser/media/router/mojo/media_router.mojom b/chrome/browser/media/router/mojo/media_router.mojom
index e26170d891ef309a70ee3b90f3a0097639aae6cb..953001c1347c3c0de6b520e948f35cd501708106 100644
--- a/chrome/browser/media/router/mojo/media_router.mojom
+++ b/chrome/browser/media/router/mojo/media_router.mojom
@@ -5,6 +5,7 @@
 module media_router.mojom;
 
 import "mojo/common/time.mojom";
+import "url/mojo/url.mojom";
 
 // Represents an output sink to which media can be routed.
 struct MediaSink {
@@ -26,6 +27,35 @@ struct MediaSink {
   string? domain;
   // The type of icon to show in the UI for this media sink.
   IconType icon_type;
+
+  // Used for feedback
+  string? model_name;
+
+  MediaSinkExtraData? extra_data;
+};
+
+union MediaSinkExtraData {
+  DialMediaSink? dial_media_sink;
+  CastMediaSink? cast_media_sink;

[dcheng, 2017/02/05 09:23:00]

? shouldn't be required on lines 38 and 39 (it's implicitly implied in a union
that only one will be set)

[zhaobin, 2017/02/06 19:37:10]

Done.

+};
+
+struct DialMediaSink {
+  // Used for feedback
+  string ip_address;
+
+  // Used for DIAL launch
+  url.mojom.Url app_url;
+};
+
+struct CastMediaSink {
+  int32 capabilities;
+
+  // Used for feedback
+  string ip_address;
+
+  // ID of cast channel opened by Media Router. The ID can be
+  // used to send call chrome.cast.channel.send.
+  int32 cast_channel_id;
 };
 
 // Should be kept in sync with media_route.h.