Remove |remote| and |readonly| members of MediaStreamTrack.

chrome/renderer/extensions/cast_streaming_native_handler.cc

Index: chrome/renderer/extensions/cast_streaming_native_handler.cc
diff --git a/chrome/renderer/extensions/cast_streaming_native_handler.cc b/chrome/renderer/extensions/cast_streaming_native_handler.cc
index 38ab2ae7408a3acac7fb5e813348139a593be654..005e7724c63c0d8175d73cb887a1eb8175d88531 100644
--- a/chrome/renderer/extensions/cast_streaming_native_handler.cc
+++ b/chrome/renderer/extensions/cast_streaming_native_handler.cc
@@ -989,12 +989,10 @@ void CastStreamingNativeHandler::AddTracksToMediaStream(
   if (!content::AddAudioTrackToMediaStream(
           audio, params.sample_rate(), params.channel_layout(),
           params.frames_per_buffer(), true,  // is_remote
-          true,                              // is_readonly
           &web_stream)) {
     LOG(ERROR) << "Failed to add Cast audio track to media stream.";
   }
   if (!content::AddVideoTrackToMediaStream(std::move(video), true,  // is_remote
-                                           true,  // is_readonly
                                            &web_stream)) {
     LOG(ERROR) << "Failed to add Cast video track to media stream.";
   }