[Presentation API] 1-UA presentation support + presenter APIs.

chrome/browser/media/router/mojo/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 {
   enum IconType {
     CAST,
@@ skipping 31 matching lines @@
   bool is_local;
   // An optional path to an HTML page bundled bundled with the media router
   // component extension. When set, the route can have custom route detail as
   // well as its own route controls in the media router dialog.
   string? custom_controller_path;
   // Set to true if this route should be displayed for |media_sink_id| in UI.
   bool for_display;
   // Set to true if this route was created by an off the record (incognito)
   // profile.
   bool off_the_record;
+  // Set to true if this route corresponds to an offscreen presentation.
+  bool is_offscreen_presentation;
 };
 
 // Notifications or an actionable events to be shown to the user.
 // When is_blocking is true, media router UI shows issue only:
 //
 //       Title
 //       Message
 //       default_action_button secondary_action_button
 //
 // When is_blocking is false, media router UI uses banner:
@@ skipping 307 matching lines @@
   // changed to |state|.
   OnPresentationConnectionStateChanged(
       string route_id, PresentationConnectionState state);
 
   // Called when the presentation connected to route |route_id| has closed.
   OnPresentationConnectionClosed(
       string route_id, PresentationConnectionCloseReason reason,
       string message);
 };