Fix crash in update_client::BackgroundDownloader::EndDownload.

Fix crash in update_client::BackgroundDownloader::EndDownload.

This happens only in debug builds when the BITS service is disabled or other COM error occurs at the beginning of the BITS download.

BUG=601451
Committed: https://crrev.com/9ce36b54bdc5e78b1464b8c1136c5b80826c4767
Cr-Commit-Position: refs/heads/master@{#386550}

[Sorin Jianu, 2016-04-12 00:09:04]

Description was changed from

==========
Fix crash in update_client::BackgroundDownloader::EndDownload.

This happens only in debug builds when the BITS service is disable or
other COM error occurs at the beginning of the BITS download.



BUG=601451
==========

to

==========
Fix crash in update_client::BackgroundDownloader::EndDownload.

This happens only in debug builds when the BITS service is disabled or other COM
error occurs at the beginning of the BITS download.



BUG=601451
==========

[Sorin Jianu, 2016-04-12 00:09:52]

sorin@chromium.org changed reviewers:
+ waffles@chromium.org

[Sorin Jianu, 2016-04-12 00:10:00]

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

[waffles, 2016-04-12 00:11:01]

lgtm

[commit-bot: I haz the power, 2016-04-12 00:11:19]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1880823002/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1880823002/20001

[Sorin Jianu, 2016-04-12 00:19:01]

The CQ bit was unchecked by sorin@chromium.org

[Sorin Jianu, 2016-04-12 00:19:06]

The CQ bit was checked by sorin@chromium.org

[Sorin Jianu, 2016-04-12 00:19:10]

The CQ bit was checked by sorin@chromium.org

[commit-bot: I haz the power, 2016-04-12 00:19:16]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1880823002/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1880823002/20001

[commit-bot: I haz the power, 2016-04-12 01:58:29]

Description was changed from

==========
Fix crash in update_client::BackgroundDownloader::EndDownload.

This happens only in debug builds when the BITS service is disabled or other COM
error occurs at the beginning of the BITS download.



BUG=601451
==========

to

==========
Fix crash in update_client::BackgroundDownloader::EndDownload.

This happens only in debug builds when the BITS service is disabled or other COM
error occurs at the beginning of the BITS download.



BUG=601451
==========

[commit-bot: I haz the power, 2016-04-12 01:58:30]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2016-04-12 02:00:01]

Description was changed from

==========
Fix crash in update_client::BackgroundDownloader::EndDownload.

This happens only in debug builds when the BITS service is disabled or other COM
error occurs at the beginning of the BITS download.



BUG=601451
==========

to

==========
Fix crash in update_client::BackgroundDownloader::EndDownload.

This happens only in debug builds when the BITS service is disabled or other COM
error occurs at the beginning of the BITS download.

BUG=601451

Committed: https://crrev.com/9ce36b54bdc5e78b1464b8c1136c5b80826c4767
Cr-Commit-Position: refs/heads/master@{#386550}
==========

[commit-bot: I haz the power, 2016-04-12 02:00:02]

Patchset 2 (id:??) landed as
https://crrev.com/9ce36b54bdc5e78b1464b8c1136c5b80826c4767
Cr-Commit-Position: refs/heads/master@{#386550}