[Presentation API] (1st) (1-UA) Add is_offscreen_presentation attribute to MediaRouter

third_party/WebKit/public/platform/modules/presentation/presentation.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.
 
 // TODO(crbug.com/647290): Rename "Session" to "Connection"
 
 module blink.mojom;
 
 import "url/mojo/url.mojom";
 
 struct PresentationSessionInfo {
   url.mojom.Url url;
   string id;
+  bool is_offscreen;
 };
 
 enum PresentationConnectionState {
   CONNECTING,
   CONNECTED,
   CLOSED,
   TERMINATED
 };
 
 enum PresentationConnectionCloseReason {
@@ skipping 114 matching lines @@
   // See PresentationService::ListenForSessionMessages.
   OnSessionMessagesReceived(PresentationSessionInfo sessionInfo,
                             array<SessionMessage> messages);
 
   // See PresentationService::SetDefaultPresentationURL.
   OnDefaultSessionStarted(PresentationSessionInfo sessionInfo);
 
   // See PresentationService::ListeningForReceiverPageRendered.
   OnReceiverConnectionAvailable(PresentationSessionInfo sessionInfo);
 };