[Presentation API] (alternative) 1-UA: send message between controller and receiver page

extensions/renderer/resources/media_router_bindings.js

 // 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.
 
 var mediaRouter;
 
 define('media_router_bindings', [
     'mojo/public/js/bindings',
     'mojo/public/js/core',
     'content/public/renderer/frame_interfaces',
@@ skipping 62 matching lines @@
       'media_route_id': route.id,
       'media_source': route.mediaSource,
       'media_sink_id': route.sinkId,
       'description': route.description,
       'icon_url': route.iconUrl,
       'is_local': route.isLocal,
       'custom_controller_path': route.customControllerPath,
       // Begin newly added properties, followed by the milestone they were
       // added.  The guard should be safe to remove N+2 milestones later.
       'for_display': route.forDisplay, // M47
-      'incognito': !!route.offTheRecord  // M50
+      'incognito': !!route.offTheRecord,  // M50
+      'is_offscreen_presentation': !!route.isOffscreenPresentation // M56
     });
   }
 
   /**
    * Converts a route message to a RouteMessage Mojo object.
    * @param {!RouteMessage} message
    * @return {!mediaRouterMojom.RouteMessage} A Mojo RouteMessage object.
    */
   function messageToMojo_(message) {
     if ("string" == typeof message.message) {
@@ skipping 781 matching lines @@
       'sink_id': this.handlers_.searchSinks(sinkId, sourceUrn, searchCriteria)
     });
   };
 
   mediaRouter = new MediaRouter(connector.bindHandleToProxy(
       frameInterfaces.getInterface(mediaRouterMojom.MediaRouter.name),
       mediaRouterMojom.MediaRouter));
 
   return mediaRouter;
 });