Use oneof in event log proto to reduce memory consumption.

Use oneof in event log proto to reduce memory consumption.

BUG=webrtc:7732
Review-Url: https://codereview.webrtc.org/2919483002
Cr-Commit-Position: refs/heads/master@{#18350}
Committed: https://chromium.googlesource.com/external/webrtc/+/8b2b9efab68a55beb7112a60bdb80bcb8425f2e6

[terelius, 2017-05-31 09:42:22]

The CQ bit was checked by terelius@webrtc.org to run a CQ dry run

[commit-bot: I haz the power, 2017-05-31 09:42:29]

Dry run: 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, 2017-05-31 10:45:15]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2017-05-31 10:45:17]

Dry run: This issue passed the CQ dry run.

[terelius, 2017-05-31 10:47:23]

terelius@webrtc.org changed reviewers:
+ ivoc@webrtc.org, kolmodin@webrtc.org

[ivoc, 2017-05-31 11:50:47]

lgtm!

[kolmodin1, 2017-05-31 12:17:12]

lgtm

lgtm!

[terelius, 2017-05-31 12:43:59]

The CQ bit was checked by terelius@webrtc.org

[commit-bot: I haz the power, 2017-05-31 12:44:06]

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, 2017-05-31 12:45:57]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1496234639619770, "parent_rev":
"2c8ac1beda6bc30a7509a122f97404a5c89dd577", "commit_rev":
"8b2b9efab68a55beb7112a60bdb80bcb8425f2e6"}

[commit-bot: I haz the power, 2017-05-31 12:46:00]

Description was changed from

==========
Use oneof in event log proto to reduce memory consumption.

BUG=webrtc:7732
==========

to

==========
Use oneof in event log proto to reduce memory consumption.

BUG=webrtc:7732

Review-Url: https://codereview.webrtc.org/2919483002
Cr-Commit-Position: refs/heads/master@{#18350}
Committed:
https://chromium.googlesource.com/external/webrtc/+/8b2b9efab68a55beb7112a60b...
==========

[commit-bot: I haz the power, 2017-05-31 12:46:01]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/external/webrtc/+/8b2b9efab68a55beb7112a60b...