Remove RtcEventLogImpl forward declaration from rtc_event_log.h

Remove RtcEventLogImpl forward declaration from rtc_event_log.h

The forward delcaration is not necessary.

BUG=None

Review-Url: https://codereview.webrtc.org/3006213002
Cr-Commit-Position: refs/heads/master@{#19729}
Committed: https://chromium.googlesource.com/external/webrtc/+/5a7dad8453956007d83187cd8a591faf46c0b6c1

[eladalon, 2017-09-07 10:01:41]

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

[eladalon, 2017-09-07 10:01:42]

PTAL

[terelius, 2017-09-07 14:01:34]

lgtm

[eladalon, 2017-09-07 14:11:15]

The CQ bit was checked by eladalon@webrtc.org

[commit-bot: I haz the power, 2017-09-07 14:11:24]

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, 2017-09-07 15:02:36]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1504793475970530, "parent_rev":
"56359be7fea745a29a47d3a36b99016e6dbd2741", "commit_rev":
"5a7dad8453956007d83187cd8a591faf46c0b6c1"}

[commit-bot: I haz the power, 2017-09-07 15:02:39]

Description was changed from

==========
Remove RtcEventLogImpl forward declaration from rtc_event_log.h

The forward delcaration is not necessary.

BUG=None
==========

to

==========
Remove RtcEventLogImpl forward declaration from rtc_event_log.h

The forward delcaration is not necessary.

BUG=None

Review-Url: https://codereview.webrtc.org/3006213002
Cr-Commit-Position: refs/heads/master@{#19729}
Committed:
https://chromium.googlesource.com/external/webrtc/+/5a7dad8453956007d83187cd8...
==========

[commit-bot: I haz the power, 2017-09-07 15:02:40]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/external/webrtc/+/5a7dad8453956007d83187cd8...