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

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.
 
 module blink.mojom;
 
 struct PresentationSessionInfo {
   string url;
   string id;
 };
@@ skipping 87 matching lines @@
   CloseConnection(string presentation_url, string presentation_id);
 
   // Called when terminate() is called by the frame.
   Terminate(string presentation_url, string presentation_id);
 
   // Starts listening for messages for session with |sessionInfo|.
   // Messages will be received in
   // PresentationServiceClient::OnSessionMessagesReceived.
   // This is called after a presentation session is created.
   ListenForSessionMessages(PresentationSessionInfo sessionInfo);
+
+  // Returns a list of available receiver connections. In addition, when new
+  // receiver connections become available, |OnReceiverConnectionAvailable|
+  // will be invoked.
+  GetReceiverConnections() => (array<PresentationSessionInfo> connections);
 };
 
 interface PresentationServiceClient {
   // Called when the client tries to listen for screen availability changes for
   // presentation of |url| but it is not supported by the device or underlying
   // platform. This can also be called if the device is currently in a mode
   // where it can't do screen discoveries (eg. low battery).
   OnScreenAvailabilityNotSupported(string url);
 
   // Called when the client is listening for screen availability for
@@ skipping 12 matching lines @@
   OnConnectionClosed(PresentationSessionInfo connection,
                      PresentationConnectionCloseReason reason,
                      string message);
 
   // See PresentationService::ListenForSessionMessages.
   OnSessionMessagesReceived(PresentationSessionInfo sessionInfo,
                             array<SessionMessage> messages);
 
   // See PresentationService::SetDefaultPresentationURL.
   OnDefaultSessionStarted(PresentationSessionInfo sessionInfo);
+
+  // See PresentationService::GetReceiverConnections.
+  OnReceiverConnectionAvailable(PresentationSessionInfo connection);
 };