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

content/public/browser/presentation_session.h

 // 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.
 
 #ifndef CONTENT_PUBLIC_BROWSER_PRESENTATION_SESSION_H_
 #define CONTENT_PUBLIC_BROWSER_PRESENTATION_SESSION_H_
 
 #include <string>
 
 #include "content/common/content_export.h"
@@ skipping 15 matching lines @@
   PRESENTATION_CONNECTION_CLOSE_REASON_CLOSED,
   PRESENTATION_CONNECTION_CLOSE_REASON_WENT_AWAY
 };
 
 // TODO(imcheng): Rename to PresentationConnectionInfo.
 // Represents a presentation session that has been established via either
 // browser actions or Presentation API.
 struct CONTENT_EXPORT PresentationSessionInfo {
   PresentationSessionInfo(const GURL& presentation_url,
                           const std::string& presentation_id);
+  PresentationSessionInfo(const GURL& presentation_url,
+                          const std::string& presentation_id,
+                          bool is_offscreen_presentation);
   ~PresentationSessionInfo();
 
   const GURL presentation_url;
   const std::string presentation_id;
+  const bool is_offscreen;
 };
 
 // Possible reasons why an attempt to create a presentation session failed.
 enum PresentationErrorType {
   PRESENTATION_ERROR_NO_AVAILABLE_SCREENS,
   PRESENTATION_ERROR_SESSION_REQUEST_CANCELLED,
   PRESENTATION_ERROR_NO_PRESENTATION_FOUND,
   PRESENTATION_ERROR_UNKNOWN,
 };
 
 // Struct returned when an attempt to create a presentation session failed.
 struct CONTENT_EXPORT PresentationError {
   PresentationError(PresentationErrorType error_type,
                     const std::string& message);
   ~PresentationError();
 
   const PresentationErrorType error_type;
   const std::string message;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_PRESENTATION_SESSION_H_