Remove a |readonly| member of MediaStreamTrack

components/test_runner/mock_webrtc_peer_connection_handler.cc

Index: components/test_runner/mock_webrtc_peer_connection_handler.cc
diff --git a/components/test_runner/mock_webrtc_peer_connection_handler.cc b/components/test_runner/mock_webrtc_peer_connection_handler.cc
index 465f414764f85d46bd3caecbe5d6804b9abc11bb..c47d2b91b3f47f5e427aec5cdb53b1f0fb6423a1 100644
--- a/components/test_runner/mock_webrtc_peer_connection_handler.cc
+++ b/components/test_runner/mock_webrtc_peer_connection_handler.cc
@@ -210,7 +210,7 @@ void MockWebRTCPeerConnectionHandler::UpdateRemoteStreams() {
       webkit_source.initialize(local_audio_tracks[i].id(),
                                blink::WebMediaStreamSource::TypeAudio,
                                local_audio_tracks[i].id(),
-                               true /* remote */, true /* readonly */);
+                               true /* remote */);
       remote_audio_tracks[i].initialize(webkit_source);
     }
 
@@ -223,7 +223,7 @@ void MockWebRTCPeerConnectionHandler::UpdateRemoteStreams() {
       webkit_source.initialize(local_video_tracks[i].id(),
                                blink::WebMediaStreamSource::TypeVideo,
                                local_video_tracks[i].id(),
-                               true /* remote */, true /* readonly */);
+                               true /* remote */);
       remote_video_tracks[i].initialize(webkit_source);
     }