Chrome Version       : 55.0.2883.105
OS Version: 8872.76.0
URLs (if applicable) :
Other browsers tested:
  Add OK or FAIL after other browsers where you have tested this issue:
     Safari 5: FAIL
  Firefox 4.x: FAIL
     IE 7/8/9: FAIL

What steps will reproduce the problem?
1.
2.
3.

What is the expected result?
Ability to cast music and picture files to Chromecast from Google Drive, like one can with videos.

What happens instead of that?
Currently this feature does not exist

Please provide any additional information below. Attach a screenshot if
possible.

UserAgentString: Mozilla/5.0 (X11; CrOS armv7l 8872.76.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/55.0.2883.105 Safari/537.36