favor DCHECK_CURRENTLY_ON for better logs in chrome/browser/media_galleries , metrics and nacl_host

favor DCHECK_CURRENTLY_ON for better logs in chrome/browser/media_galleries , metrics and nacl_host modules

BUG=466848
Committed: https://crrev.com/21999efe098e256c5b2099f450d155e6d48a4cd8
Cr-Commit-Position: refs/heads/master@{#327233}

[anujsharma, 2015-04-27 10:17:53]

anujk.sharma@samsung.com changed reviewers:
+ estade@chromium.org, mpearson@chromium.org, mseaborn@chromium.org

[anujsharma, 2015-04-27 10:17:54]

mseaborn@chromium.org: Please review changes in chrome/browser/nacl_host

estade@chromium.org: Please review changes in chrome/browser/media_galleries

mpearson@chromium.org: Please review changes in chrome/browser/metrics

[Mark P, 2015-04-27 22:30:38]

lgtm

I am right in assuming this is a mechanical change that has no functional impact
(things crash after this change if and only if they crashed before), just meant
to improve error messages?

--mark

[Evan Stade, 2015-04-27 22:33:32]

lgtm

[Mark Seaborn, 2015-04-27 22:39:07]

LGTM

[anujsharma, 2015-04-28 03:16:24]

On 2015/04/27 22:39:07, Mark Seaborn wrote:
> LGTM

Thanks Mark P, Evan and Mark Seaborn for lgtm.

[anujsharma, 2015-04-28 03:16:27]

The CQ bit was checked by anujk.sharma@samsung.com

[commit-bot: I haz the power, 2015-04-28 03:16:32]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1102233002/1

[commit-bot: I haz the power, 2015-04-28 04:57:22]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-04-28 04:58:09]

Patchset 1 (id:??) landed as
https://crrev.com/21999efe098e256c5b2099f450d155e6d48a4cd8
Cr-Commit-Position: refs/heads/master@{#327233}