[Download Home] Pull out DeletedFileTracker from DownloadHistoryAdapter

[Download Home] Pull out DeletedFileTracker from DownloadHistoryAdapter

* Pull out the maps that track whether a DownloadItem has been
  deleted externally.

* Clean up the logic slightly so that the DownloadItem is
  queried about its incognito status instead of passing around
  a separate boolean.

* Update the tests to account for the DownloadItem tracking
  incognito state.

BUG=654630
Committed: https://crrev.com/3d622f398a16812eee8f4fdfde7aa58b0c70b7fe
Cr-Commit-Position: refs/heads/master@{#432103}

[gone, 2016-11-14 23:25:29]

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

[gone, 2016-11-14 23:25:30]

Mostly a cleanup, but I did remove some parameters assuming that DownloadItem
would have them properly set.

[Theresa, 2016-11-15 01:29:05]

lgtm. Thanks for cleaning this up.

[gone, 2016-11-15 01:33:33]

Yar... plenty more to go :)  Still racking my brain over how to best do it,
though.

[gone, 2016-11-15 01:33:39]

The CQ bit was checked by dfalcantara@chromium.org

[commit-bot: I haz the power, 2016-11-15 01:34:42]

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, 2016-11-15 04:49:06]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-11-15 04:57:27]

Description was changed from

==========
[Download Home] Pull out DeletedFileTracker from DownloadHistoryAdapter

* Pull out the maps that track whether a DownloadItem has been
  deleted externally.

* Clean up the logic slightly so that the DownloadItem is
  queried about its incognito status instead of passing around
  a separate boolean.

* Update the tests to account for the DownloadItem tracking
  incognito state.

BUG=654630
==========

to

==========
[Download Home] Pull out DeletedFileTracker from DownloadHistoryAdapter

* Pull out the maps that track whether a DownloadItem has been
  deleted externally.

* Clean up the logic slightly so that the DownloadItem is
  queried about its incognito status instead of passing around
  a separate boolean.

* Update the tests to account for the DownloadItem tracking
  incognito state.

BUG=654630

Committed: https://crrev.com/3d622f398a16812eee8f4fdfde7aa58b0c70b7fe
Cr-Commit-Position: refs/heads/master@{#432103}
==========

[commit-bot: I haz the power, 2016-11-15 04:57:28]

Patchset 1 (id:??) landed as
https://crrev.com/3d622f398a16812eee8f4fdfde7aa58b0c70b7fe
Cr-Commit-Position: refs/heads/master@{#432103}