This accessor seems to be unused, and has a name that we don't
want to support ("content_name").
Bug: none
Change-Id: I2f332176429dd8e1895f821d30e4beaaa4650ec2
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/168195
Reviewed-by: Steve Anton <steveanton@webrtc.org>
Commit-Queue: Harald Alvestrand <hta@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#30460}