Clean up log messages in vt_video_decode_accelerator_mac.cc.

Clean up log messages in vt_video_decode_accelerator_mac.cc.

Minor cleanups, and change some "normal" LOG(WARNING) messages to DLOG.

Committed: https://crrev.com/b7bdc1c4650d6d5eb091bc18746d4ab8b208f584
Cr-Commit-Position: refs/heads/master@{#387767}

[sandersd (OOO until July 31), 2016-04-15 21:03:30]

sandersd@chromium.org changed reviewers:
+ watk@chromium.org

[watk, 2016-04-15 23:17:16]

lgtm

[sandersd (OOO until July 31), 2016-04-15 23:26:37]

The CQ bit was checked by sandersd@chromium.org

[commit-bot: I haz the power, 2016-04-15 23:27:08]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1891273004/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1891273004/1

[commit-bot: I haz the power, 2016-04-16 00:30:53]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-04-16 00:32:14]

Description was changed from

==========
Clean up log messages in vt_video_decode_accelerator_mac.cc.

Minor cleanups, and change some "normal" LOG(WARNING) messages to DLOG.
==========

to

==========
Clean up log messages in vt_video_decode_accelerator_mac.cc.

Minor cleanups, and change some "normal" LOG(WARNING) messages to DLOG.

Committed: https://crrev.com/b7bdc1c4650d6d5eb091bc18746d4ab8b208f584
Cr-Commit-Position: refs/heads/master@{#387767}
==========

[commit-bot: I haz the power, 2016-04-16 00:32:14]

Patchset 1 (id:??) landed as
https://crrev.com/b7bdc1c4650d6d5eb091bc18746d4ab8b208f584
Cr-Commit-Position: refs/heads/master@{#387767}