Harald Alvestrand 0e7b3a9dad Add a Clone() method to SessionDescriptionInterface
This should allow us to remove some SDP parsing in Chromium.

Bug: webrtc:12215
Change-Id: Ib85593d1c9226b29f2ec18617f945c76eca3b2d7
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/197806
Reviewed-by: Henrik Boström <hbos@webrtc.org>
Commit-Queue: Harald Alvestrand <hta@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#32840}
2020-12-16 08:05:10 +00:00
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