Revert of Add a whole-app-list unit test.

Revert of Add a whole-app-list unit test. (https://codereview.chromium.org/210083009/)

Reason for revert:
Despite all the green, and earlier full compile on the same bot, now fails compile on Linux Builder.

../../ui/app_list/views/app_list_view_unittest.cc:239:8:error: 'host' was not declared in this scope

link: http://build.chromium.org/p/chromium.linux/builders/Linux%20Builder/builds/31637

Original issue's description:
> Add a whole-app-list unit test.
> 
> This establishes a test harness for doing tests that touch on multiple
> parts of the app launcher UI, or that need coverage for the various app
> launcher configurations: Ash or Desktop; regular or experimental
> "landscape" mode.
> 
> It currently just tests displaying and closing the app launcher in its
> default state with a flat (no folders), 2- or 3-page model.
> 
> BUG=169114
> TEST=Added unit tests AppListViewTest{Aura,Desktop}.*
> 
> Previously committed: http://crrev.com/260762 http://crrev.com/260803
> 
> Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=270615

TBR=tapted@chromium.org
NOTRY=true
NOTREECHECKS=true

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=270619

[tapted, 2014-05-15 07:29:50]

Created Revert of Add a whole-app-list unit test.

[commit-bot: I haz the power, 2014-05-15 07:30:54]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/tapted@chromium.org/290433003/1

[commit-bot: I haz the power, 2014-05-15 07:30:55]

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

[commit-bot: I haz the power, 2014-05-15 07:30:55]

No LGTM from a valid reviewer yet. Only full committers are accepted.
Even if an LGTM may have been provided, it was from a non-committer or
a provisional committer, _not_ a full super star committer.
See http://www.chromium.org/getting-involved/become-a-committer
Note that this has nothing to do with OWNERS files.

[tapted, 2014-05-15 07:32:12]

The CQ bit was checked by tapted@chromium.org

[commit-bot: I haz the power, 2014-05-15 07:33:23]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/tapted@chromium.org/290433003/1

[commit-bot: I haz the power, 2014-05-15 07:35:05]

Change committed as 270619