This method isn't currently mocked or required by any test, so the safe thing
is to return a reasonably large value from the implementation to avoid busy loops.
BUG=webrtc:7187
TBR=mflodman@webrtc.org
Review-Url: https://codereview.webrtc.org/2744233002
Cr-Commit-Position: refs/heads/master@{#17284}