Remove DCHECK from the component updater background downloader code.

Remove DCHECK from the component updater background downloader code.

The threading issue needs to be fixed according to crbug.com/644857

R=waffles
BUG=644854
Committed: https://crrev.com/c1210527860aafd4b24f0b91b9934ed19eac4aac
Cr-Commit-Position: refs/heads/master@{#417103}

[Sorin Jianu, 2016-09-07 21:51:09]

The CQ bit was checked by sorin@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2016-09-07 21:52:00]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[waffles, 2016-09-07 21:52:04]

lgtm

[commit-bot: I haz the power, 2016-09-07 22:33:48]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-09-07 22:33:48]

Dry run: This issue passed the CQ dry run.

[Sorin Jianu, 2016-09-07 22:36:09]

The CQ bit was checked by sorin@chromium.org

[commit-bot: I haz the power, 2016-09-07 22:37:09]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-09-07 22:42:24]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-09-07 22:45:38]

Description was changed from

==========
Remove DCHECK from the component updater background downloader code.

The threading issue needs to be fixed according to crbug.com/644857

R=waffles
BUG=644854
==========

to

==========
Remove DCHECK from the component updater background downloader code.

The threading issue needs to be fixed according to crbug.com/644857

R=waffles
BUG=644854

Committed: https://crrev.com/c1210527860aafd4b24f0b91b9934ed19eac4aac
Cr-Commit-Position: refs/heads/master@{#417103}
==========

[commit-bot: I haz the power, 2016-09-07 22:45:39]

Patchset 1 (id:??) landed as
https://crrev.com/c1210527860aafd4b24f0b91b9934ed19eac4aac
Cr-Commit-Position: refs/heads/master@{#417103}