[Android] Fix some nits in DownloadItemWrapper

[Android] Fix some nits in DownloadItemWrapper

This CL fixes some nits in DownloadHistoryItemWrapper, including java
class attributs initialization, and java unboxing.

BUG=NONE

Committed: https://crrev.com/7fab9e1e4ba4038a8f2f3f8254d303a8a94f2b28
Cr-Commit-Position: refs/heads/master@{#413301}

[Ian Wen, 2016-08-19 22:54:51]

ianwen@chromium.org changed reviewers:
+ dfalcantara@chromium.org

[Ian Wen, 2016-08-19 22:54:52]

This big CL is urgent, complex, and feature critical. Let's merge it to M52.

Haha just kidding. :P

[gone, 2016-08-19 23:00:26]

The realism of the situation hurts.

lgtm

[Ian Wen, 2016-08-19 23:02:26]

The CQ bit was checked by ianwen@chromium.org

[commit-bot: I haz the power, 2016-08-19 23:03:42]

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, 2016-08-20 00:52:14]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-08-20 00:55:16]

Description was changed from

==========
[Android] Fix some nits in DownloadItemWrapper

This CL fixes some nits in DownloadHistoryItemWrapper, including java
class attributs initialization, and java unboxing.

BUG=NONE
==========

to

==========
[Android] Fix some nits in DownloadItemWrapper

This CL fixes some nits in DownloadHistoryItemWrapper, including java
class attributs initialization, and java unboxing.

BUG=NONE

Committed: https://crrev.com/7fab9e1e4ba4038a8f2f3f8254d303a8a94f2b28
Cr-Commit-Position: refs/heads/master@{#413301}
==========

[commit-bot: I haz the power, 2016-08-20 00:55:16]

Patchset 1 (id:??) landed as
https://crrev.com/7fab9e1e4ba4038a8f2f3f8254d303a8a94f2b28
Cr-Commit-Position: refs/heads/master@{#413301}