Fix issue with zero rtt reports when using FlexFEC and add perf test.

Fix issue with zero rtt reports when using FlexFEC and add perf test.

BUG=webrtc:7938
Review-Url: https://codereview.webrtc.org/2966153002
Cr-Commit-Position: refs/heads/master@{#18898}
Committed: https://chromium.googlesource.com/external/webrtc/+/889d9654f79ba25d4a63f33fa62a1d5cb48e77ec

[stefan-webrtc, 2017-07-05 08:56:04]

stefan@webrtc.org changed reviewers:
+ terelius@webrtc.org

[terelius, 2017-07-05 09:22:02]

lgtm

[stefan-webrtc, 2017-07-05 09:22:24]

The CQ bit was checked by stefan@webrtc.org

[commit-bot: I haz the power, 2017-07-05 09:22:30]

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, 2017-07-05 10:03:03]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1499246544021540, "parent_rev":
"070efc088e7171a8bccd86d074ef09eca6c29397", "commit_rev":
"889d9654f79ba25d4a63f33fa62a1d5cb48e77ec"}

[commit-bot: I haz the power, 2017-07-05 10:03:06]

Description was changed from

==========
Fix issue with zero rtt reports when using FlexFEC and add perf test.

BUG=webrtc:7938
==========

to

==========
Fix issue with zero rtt reports when using FlexFEC and add perf test.

BUG=webrtc:7938

Review-Url: https://codereview.webrtc.org/2966153002
Cr-Commit-Position: refs/heads/master@{#18898}
Committed:
https://chromium.googlesource.com/external/webrtc/+/889d9654f79ba25d4a63f33fa...
==========

[commit-bot: I haz the power, 2017-07-05 10:03:07]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/external/webrtc/+/889d9654f79ba25d4a63f33fa...