[Presentation API] Change ListenForSessionMessages API to client-style.

chrome/browser/media/router/media_router.mojom

 // Copyright 2015 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.
 
 module media_router.interfaces;
 
 // Represents an output sink to which media can be routed.
 struct MediaSink {
   // The sink identifier, e.g. "rs71w7mFzYLFlabir_qO4NHl6SUc."
   string sink_id;
@@ skipping 71 matching lines @@
 
   // A help page to be opened if users select learn_more.
   string? help_url;
 };
 
 struct RouteMessage {
   enum Type {
     TEXT,
     BINARY
   };
-  // The route ID of this message.
-  string route_id;
   // The type of this message.
   Type type;
   // Used when the |type| is TEXT.
   string? message;
   // Used when the |type| is BINARY.
   array<uint8>? data;
 };
 
 // Modeled after the MediaRouter interface defined in
 // chrome/browser/media/router/media_router.h
@@ skipping 52 matching lines @@
   // StopObservingMediaRoutes() is called.
   StartObservingMediaRoutes();
 
   // Stops querying the state of all media routes.
   StopObservingMediaRoutes();
 
   // "Clears" an issue after it is addressed.
   ClearIssue(string issue_id);
 
   // Called when the MediaRouter is ready to get the next batch of messages
-  // associated with one of the |route_ids|.
-  ListenForRouteMessages(array<string> route_ids)
-      => (array<RouteMessage> messages);
+  // associated with |route_id|.
+  ListenForRouteMessages(string route_id) => (array<RouteMessage> messages);
 };
 
 // Interface for a service which observes state changes across media
 // sources, sinks, and issues.
 interface MediaRouter {
   // Registers a MediaRouteProvider with the MediaRouter.
   // Returns a string that uniquely identifies the Media Router browser
   // process.
   RegisterMediaRouteProvider(MediaRouteProvider media_router_provider) =>
       (string instance_id);
 
   // Called when the Media Route Manager receives a new list of sinks.
   OnSinksReceived(string media_source, array<MediaSink> sinks);
 
   // Called when issues are reported for media routes.
   OnIssue(Issue issue);
 
   // Called when list of routes has been updated.
   OnRoutesUpdated(array<MediaRoute> routes);
 };