Report if video capturing meets output protection requirement.

content/common/media/media_stream_messages.h

 // Copyright (c) 2012 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.
 
 // IPC messages for the media streaming.
 // Multiply-included message file, hence no include guard.
 
 #include <string>
 
 #include "content/common/content_export.h"
@@ skipping 134 matching lines @@
                      std::string /*label*/)
 
 // Subscribe to notifications about changes in the set of media devices.
 IPC_MESSAGE_CONTROL2(MediaStreamHostMsg_SubscribeToDeviceChangeNotifications,
                      int /* render frame id */,
                      url::Origin /* security origin */)
 
 // Cancel notifications about changes in the set of media devices.
 IPC_MESSAGE_CONTROL1(MediaStreamHostMsg_CancelDeviceChangeNotifications,
                      int /* render frame id */)
+
+// Tell the browser process if the video capture is secure (i.e., all
+// connected video sinks meet the requirement of output protection.).
+IPC_MESSAGE_CONTROL3(MediaStreamHostMsg_SetCapturingLinkSecured,
+                     int,                      /* session_id */
+                     content::MediaStreamType, /* type */
+                     bool /* is_secure */)