[unpacker] Whitelist the new ZIP unpacker for display_in_launcher feature.

[unpacker] Whitelist the new ZIP unpacker for display_in_launcher feature.

The app doesn't have any UI, so it shouldn't show in the launcher. It can't
be an extension because it uses file handlers.

We're going to remove this whitelist once file handlers availability to
extensions is resolved.

TEST=Tested manually that the icon is gone.
BUG=427747
Committed: https://crrev.com/7d9752185b04ee431f9f10e20744b376a1f3fab8
Cr-Commit-Position: refs/heads/master@{#302238}

[mtomasz, 2014-10-30 08:31:35]

mtomasz@chromium.org changed reviewers:
+ benwells@chromium.org

[mtomasz, 2014-10-30 08:31:43]

@benwells: PTAL. Thanks.

[benwells, 2014-10-30 22:23:10]

is this a component app?

[mtomasz, 2014-10-30 23:33:50]

On 2014/10/30 22:23:10, benwells wrote:
> is this a component app?

External component.

[benwells, 2014-10-31 06:16:58]

lgtm

[mtomasz, 2014-10-31 06:22:42]

The CQ bit was checked by mtomasz@chromium.org

[commit-bot: I haz the power, 2014-10-31 06:23:51]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/688123003/1

[commit-bot: I haz the power, 2014-10-31 07:03:59]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2014-10-31 07:24:46]

Patchset 1 (id:??) landed as
https://crrev.com/7d9752185b04ee431f9f10e20744b376a1f3fab8
Cr-Commit-Position: refs/heads/master@{#302238}