cc: Address comments for https://codereview.chromium.org/1287043002/

cc: Address comments for API to release OutputSurface

This lets us land https://codereview.chromium.org/1287043002/
while the author is away, and follow up here. Some fixes for
trace events, dchecks, and code sharing.

BUG=374906
CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel

Committed: https://crrev.com/e83e41db9ac1efad11c7899ec3019064145e14d9
Cr-Commit-Position: refs/heads/master@{#349808}

[no sievers, 2015-09-18 22:14:53]

sievers@chromium.org changed reviewers:
+ danakj@chromium.org

[no sievers, 2015-09-18 22:15:02]

ptal

[danakj, 2015-09-18 22:18:09]

LGTM

[no sievers, 2015-09-18 22:51:45]

The CQ bit was checked by sievers@chromium.org

[commit-bot: I haz the power, 2015-09-18 22:52:17]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1352763003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1352763003/1

[commit-bot: I haz the power, 2015-09-18 23:33:33]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-09-18 23:34:03]

Patchset 1 (id:??) landed as
https://crrev.com/e83e41db9ac1efad11c7899ec3019064145e14d9
Cr-Commit-Position: refs/heads/master@{#349808}

[sohanjg, 2015-09-23 13:33:05]

On 2015/09/18 23:34:03, commit-bot: I haz the power wrote:
> Patchset 1 (id:??) landed as
> https://crrev.com/e83e41db9ac1efad11c7899ec3019064145e14d9
> Cr-Commit-Position: refs/heads/master@{#349808}

thanks for looking into the comments sievers.