Harald Alvestrand 76d295231a Don't crash when sender info has been discarded by lower layers.
This happens when pc.close() is called.
As a stopgap measure, we return zeroes instead, leading to stats
being omitted.

Bug: chromium:807174
Change-Id: I36f342adcd038822afb75d8593de808591eb9c4b
Reviewed-on: https://webrtc-review.googlesource.com/46161
Reviewed-by: Henrik Boström <hbos@webrtc.org>
Commit-Queue: Harald Alvestrand <hta@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#21813}
2018-01-30 18:04:06 +00:00
..
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