Products Cast Reference Class: MediaSessionEventData cast.framework.MediaSessionEventData class static Media session changed event data. Constructor MediaSessionEventData new MediaSessionEventData(mediaSession) Parameter mediaSession chrome.cast.media.Media Media session. Value must not be null. Property mediaSession non-null chrome.cast.media.Media Media session. Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 3.0 License, and code samples are licensed under the Apache 2.0 License. For details, see our Site Policies. Java is a registered trademark of Oracle and/or its affiliates. Last updated June 16, 2017.