Allow rtp::Packet::*RawExtension to take 0 as an extension id

Allow rtp::Packet::*RawExtension to take 0 as an extension id

BUG=webrtc:7433
Review-Url: https://codereview.webrtc.org/2803623004
Cr-Commit-Position: refs/heads/master@{#17610}
Committed: https://chromium.googlesource.com/external/webrtc/+/c547e84ec5b935151a8fe9797f283665b660dd24

[danilchap, 2017-04-06 11:18:13]

danilchap@webrtc.org changed reviewers:
+ nisse@webrtc.org

[nisse-webrtc, 2017-04-10 06:58:19]

lgtm

[danilchap, 2017-04-10 07:40:20]

The CQ bit was checked by danilchap@webrtc.org

[commit-bot: I haz the power, 2017-04-10 07:40:31]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.webrtc.org/...

[commit-bot: I haz the power, 2017-04-10 08:31:49]

CQ is committing da patch.

Bot data: {"patchset_id": 20001, "attempt_start_ts": 1491810020451360,
"parent_rev": "02465b8a11dd7a8d9cd3d26cfdd3d0cd2e4f8782", "commit_rev":
"c547e84ec5b935151a8fe9797f283665b660dd24"}

[commit-bot: I haz the power, 2017-04-10 08:31:52]

Description was changed from

==========
Allow rtp::Packet::*RawExtension to take 0 as an extension id

BUG=webrtc:7433
==========

to

==========
Allow rtp::Packet::*RawExtension to take 0 as an extension id

BUG=webrtc:7433

Review-Url: https://codereview.webrtc.org/2803623004
Cr-Commit-Position: refs/heads/master@{#17610}
Committed:
https://chromium.googlesource.com/external/webrtc/+/c547e84ec5b935151a8fe9797...
==========

[commit-bot: I haz the power, 2017-04-10 08:31:53]

Committed patchset #2 (id:20001) as
https://chromium.googlesource.com/external/webrtc/+/c547e84ec5b935151a8fe9797...