Don't override deprecated method in FakeRtpSender mock

Bug: 803494
Change-Id: Id4059fd33bccb23b091ab0b999239392db7395eb
Reviewed-on: https://chromium-review.googlesource.com/1080507
Reviewed-by: Henrik Boström <hbos@chromium.org>
Commit-Queue: Florent Castelli <orphis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#563197}
2 files changed