[RemotePlayback] Keep track of source compatibility and reject prompt() correspondingly

content/common/media/media_player_messages_android.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 android media player.
 // Multiply-included message file, hence no include guard.
 
 #include "base/time/time.h"
 #include "content/common/content_export.h"
 #include "ipc/ipc_message_macros.h"
@@ skipping 111 matching lines @@
 
 // The remote playback has started.
 IPC_MESSAGE_ROUTED1(MediaPlayerMsg_RemotePlaybackStarted,
                     int /* player_id */)
 
 // The remote playback device selection has been cancelled.
 IPC_MESSAGE_ROUTED1(MediaPlayerMsg_CancelledRemotePlaybackRequest,
                     int /* player_id */)
 
 // The availability of remote devices has changed
-IPC_MESSAGE_ROUTED2(MediaPlayerMsg_RemoteRouteAvailabilityChanged,
+IPC_MESSAGE_ROUTED3(MediaPlayerMsg_RemoteRouteAvailabilityChanged,
                     int /* player_id */,
-                    bool /* routes_available */)
+                    bool /* is_route_available */,
+                    bool /* is_source_compatible */)

[dcheng, 2016/11/09 19:03:41]

Sorry, I should have been clearer in my original comments, but can we use the
enum here as well?

[whywhat, 2016/11/09 22:09:28]

Any advice on reusing the enum from public/platform/?

third_party/WebKit is not allowed in content/common or chrome/browser.
I bet content/common is not allowed in blink either.

 
 // Messages for controlling the media playback in browser process ----------
 
 // Destroy the media player object.
 IPC_MESSAGE_ROUTED1(MediaPlayerHostMsg_DestroyMediaPlayer,
                     int /* player_id */)
 
 // Initialize a media player object.
 IPC_MESSAGE_ROUTED1(
     MediaPlayerHostMsg_Initialize,
@@ skipping 32 matching lines @@
 IPC_MESSAGE_ROUTED1(MediaPlayerHostMsg_RequestRemotePlayback,
                     int /* player_id */)
 
 // Control media playing on a remote device.
 IPC_MESSAGE_ROUTED1(MediaPlayerHostMsg_RequestRemotePlaybackControl,
                     int /* player_id */)
 
 // Stop playing media on a remote device.
 IPC_MESSAGE_ROUTED1(MediaPlayerHostMsg_RequestRemotePlaybackStop,
                     int /* player_id */)