Non-Local Join for Media Router and Presentation API

chrome/browser/media/router/media_router.mojom

Index: chrome/browser/media/router/media_router.mojom
diff --git a/chrome/browser/media/router/media_router.mojom b/chrome/browser/media/router/media_router.mojom
index 2330a1e94c804abb5c5d7bfaee1502032ed59a4a..b75e15b565c5592f67cd0f29b98bf19ee543b948 100644
--- a/chrome/browser/media/router/media_router.mojom
+++ b/chrome/browser/media/router/media_router.mojom
@@ -160,12 +160,15 @@ interface MediaRouteProvider {
   StopObservingMediaSinks(string media_source);
 
   // Starts reporting the state of active media routes via
-  // OnRoutesUpdated(). Querying will continue until
-  // StopObservingMediaRoutes() is called.
-  StartObservingMediaRoutes();
+  // OnRoutesUpdated() in the context of the |media_source|.
+  // The |media_source| should be considered when returning joinable
+  // routes in the OnRoutesUpdated() call.
+  // Querying will continue until StopObservingMediaRoutes() is called.
+  StartObservingMediaRoutes(string media_source);
 
-  // Stops querying the state of all media routes.
-  StopObservingMediaRoutes();
+  // Stops querying the state of all media routes in the context of
+  // the |media_source|.
+  StopObservingMediaRoutes(string media_source);
 
   // Called when the MediaRouter is ready to get the next batch of messages
   // associated with |route_id|.
@@ -213,8 +216,11 @@ interface MediaRouter {
   // Called when issues are reported for media routes.
   OnIssue(Issue issue);
 
-  // Called when list of routes has been updated.
-  OnRoutesUpdated(array<MediaRoute> routes);
+  // Called when list of routes has been updated in the context of the
+  // calling |media_source|.  The array |joinable_route_ids| should
+  // contain route IDs of joinable routes found in the |routes| array.
+  OnRoutesUpdated(string media_source, array<MediaRoute> routes,
+      array<string> joinable_route_ids);
 
   // Called when the overall availability of media sinks has been updated.
   OnSinkAvailabilityUpdated(SinkAvailability availability);