[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..8e16794a7ecba649d878479de4ca1eb6f9ae00c9 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 {
@@ -28,6 +29,36 @@ struct MediaSink {
   IconType icon_type;
 };
 
+// Represents a sink discovered by MediaSinkService.

[imcheng, 2017/02/11 01:00:21]

Represents a sink discovered by Media Router, which is pushed to the
MediaRouteProvider. It wraps a MediaSink with additional data required by the
MediaRouteProvider to perform additional operations, such as route creation.

[zhaobin, 2017/02/14 02:08:49]

Done.

+struct TypedMediaSink {
+  MediaSink sink;
+
+  string ip_address;
+
+  // Model name of the sink, if it represents a physical device.
+  string? model_name;
+
+  MediaSinkExtraData extra_data;
+};
+
+union MediaSinkExtraData {
+  DialMediaSink dial_media_sink;
+  CastMediaSink cast_media_sink;
+};
+
+struct DialMediaSink {
+  // Used for DIAL launch
+  url.mojom.Url app_url;
+};
+
+struct CastMediaSink {
+  int32 capabilities;
+
+  // 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.
 struct MediaRoute {
   // The ID of this media route, e.g. "r_PR1O_blkC9dsKp-tb1ti8qurOo".