Change DCHECKs to CHECKs to investigate a crash when aborting in Files app.

Change DCHECKs to CHECKs to investigate a crash when aborting in Files app.

This crash happens often, but I'm unable to reproduce it, so can't find the
root cause.

The suspects are corruption of memory which are protected with DCHECKs.

TEST=Not related.
BUG=454310
Committed: https://crrev.com/56b45a9336e040f95ff0e0977d07ce42c87b283a
Cr-Commit-Position: refs/heads/master@{#318217}

[mtomasz, 2015-02-26 08:49:34]

mtomasz@chromium.org changed reviewers:
+ hirono@chromium.org

[mtomasz, 2015-02-26 08:49:35]

@hirono: PTAL. We need to merge it to beta asap.

[mtomasz, 2015-02-26 11:11:57]

mtomasz@chromium.org changed reviewers:
+ fukino@chromium.org

[mtomasz, 2015-02-26 11:12:30]

mtomasz@chromium.org changed reviewers:
- hirono@chromium.org

[mtomasz, 2015-02-26 11:12:30]

@fukino: PTAL. Thanks.

[fukino, 2015-02-26 11:13:25]

lgtm. Thanks!

[mtomasz, 2015-02-26 11:13:51]

Thanks!

[mtomasz, 2015-02-26 11:13:57]

The CQ bit was checked by mtomasz@chromium.org

[commit-bot: I haz the power, 2015-02-26 11:14:09]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/957983002/20001

[commit-bot: I haz the power, 2015-02-26 11:54:23]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-02-26 11:55:17]

Patchset 2 (id:??) landed as
https://crrev.com/56b45a9336e040f95ff0e0977d07ce42c87b283a
Cr-Commit-Position: refs/heads/master@{#318217}