Delete unused class ComThread.

Delete unused class ComThread.

BUG=None

Review-Url: https://codereview.webrtc.org/2835893003
Cr-Commit-Position: refs/heads/master@{#17857}
Committed: https://chromium.googlesource.com/external/webrtc/+/30cba07bd11cd5475550488a1b58404d7779cb93

[nisse-webrtc, 2017-04-24 09:50:39]

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

[nisse-webrtc, 2017-04-24 09:50:39]

While working on other changes touching thread.cc, I noticed this class, which
appears unused. Ok to delete?

[tommi, 2017-04-24 09:52:54]

tommi@webrtc.org changed reviewers:
+ tommi@webrtc.org

[tommi, 2017-04-24 09:52:54]

lgtm

[pthatcher1, 2017-04-24 22:46:59]

lgtm

[nisse-webrtc, 2017-04-25 06:37:46]

The CQ bit was checked by nisse@webrtc.org

[commit-bot: I haz the power, 2017-04-25 06:38:00]

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, 2017-04-25 07:09:16]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1493102266072010, "parent_rev":
"073581f96cd5b2d6517479e08dfb150fbc0b43a5", "commit_rev":
"30cba07bd11cd5475550488a1b58404d7779cb93"}

[commit-bot: I haz the power, 2017-04-25 07:09:19]

Description was changed from

==========
Delete unused class ComThread.

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

to

==========
Delete unused class ComThread.

BUG=None

Review-Url: https://codereview.webrtc.org/2835893003
Cr-Commit-Position: refs/heads/master@{#17857}
Committed:
https://chromium.googlesource.com/external/webrtc/+/30cba07bd11cd5475550488a1...
==========

[commit-bot: I haz the power, 2017-04-25 07:09:20]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/external/webrtc/+/30cba07bd11cd5475550488a1...