Remove a |readonly| member of MediaStreamTrack

components/test_runner/mock_web_user_media_client.cc

Index: components/test_runner/mock_web_user_media_client.cc
diff --git a/components/test_runner/mock_web_user_media_client.cc b/components/test_runner/mock_web_user_media_client.cc
index e83105fb2d5be199eac5653ac077ff02bdc5ee0f..dd5b6a5037a40055ce10cf3a6f8d36ce2ff8dd39 100644
--- a/components/test_runner/mock_web_user_media_client.cc
+++ b/components/test_runner/mock_web_user_media_client.cc
@@ -69,8 +69,7 @@ void MockWebUserMediaClient::requestUserMedia(
       source.initialize("MockAudioDevice#1",
                         WebMediaStreamSource::TypeAudio,
                         "Mock audio device",
-                        false /* remote */,
-                        true /* readonly */);
+                        false /* remote */);
       WebMediaStreamTrack web_track;
       web_track.initialize(source);
       stream.addTrack(web_track);
@@ -82,7 +81,7 @@ void MockWebUserMediaClient::requestUserMedia(
       source.initialize("MockVideoDevice#1",
                         WebMediaStreamSource::TypeVideo,
                         "Mock video device",
-                        false /* remote */, true /* readonly */);
+                        false /* remote */);
       WebMediaStreamTrack web_track;
       web_track.initialize(source);
       stream.addTrack(web_track);