[Presentation API] Mojo typemap for content::PresentationConnectionMessage

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";
 
@@ skipping 21 matching lines @@
   NO_PRESENTATION_FOUND,
   PREVIOUS_START_IN_PROGRESS,
   UNKNOWN,
 };
 
 struct PresentationError {
   PresentationErrorType error_type;
   string message;
 };
 
-enum PresentationMessageType {
-  TEXT,
-  BINARY,
-};
-
-struct ConnectionMessage {
-  PresentationMessageType type;
-  // Used when message type is TEXT.
-  string? message;
-  // Used when message type is BINARY.
-  // TODO(lethalantidote): Make this a mojo union.
-  // See https://crbug.com/632623.
-  array<uint8>? data;
+union PresentationConnectionMessage {
+  string message;
+  array<uint8> data;
 };
 
 interface PresentationConnection {
    // TODO(zhaobin): migrate SendConnectionMessage from PresentationService =>
    // PresentationConnection.Send(). http://crbug.com/658474
 
    // Called when a message is sent by the target connection.
-   OnMessage(ConnectionMessage message) => (bool success);
+   OnMessage(PresentationConnectionMessage message) => (bool success);
 
    // Called when target connection notifies connection state change.
    DidChangeState(PresentationConnectionState state);
 
    // Called when target connection calls close().
    OnClose();
 };
 
 interface PresentationService {
   // Sets the PresentationServiceClient.
@@ skipping 37 matching lines @@
 
   // Called in StartSession's callback function for offscreen presentation only.
   // It passes in controlling frame's PresentationConnection and
   // PresentationConnectionRequest to PresentationService.
   SetPresentationConnection(
       PresentationSessionInfo sessionInfo,
       PresentationConnection controller_connection_ptr,
       PresentationConnection& receiver_connection_request);
 
   //////////////////////////////////////////////////////////////////////////////
-
   // Called when close() is called by the frame.
   CloseConnection(url.mojom.Url presentation_url, string presentation_id);
 
   // Called when terminate() is called by the frame.
   Terminate(url.mojom.Url presentation_url, string presentation_id);
 
   // Starts listening for messages for session with |sessionInfo|.
   // Messages will be received in
   // PresentationServiceClient::OnConnectionMessagesReceived.
   // This is called after a presentation session is created.
@@ skipping 27 matching lines @@
                            PresentationConnectionState newState);
 
   // Caled when the state of |connection| started on this frame has changed to
   // CLOSED.
   OnConnectionClosed(PresentationSessionInfo connection,
                      PresentationConnectionCloseReason reason,
                      string message);
 
   // See PresentationService::ListenForConnectionMessages.
   OnConnectionMessagesReceived(PresentationSessionInfo sessionInfo,
-                            array<ConnectionMessage> messages);
+                               array<PresentationConnectionMessage> messages);
 
   // Called on a presentation receiver when presentation connection is available
   // from the controlling page.
   OnReceiverConnectionAvailable(
       PresentationSessionInfo sessionInfo,
       PresentationConnection controller_connection_ptr,
       PresentationConnection& receiver_connection_request);
 };