Files.app: Enable PIEX loader for official build.

Files.app: Enable PIEX loader for official build.

The PIEX library has been submitted to official chrome repository.
The CL let Files.app use the library to load RAW thumbnails.

BUG=396702
TEST=None

Committed: https://crrev.com/e4193786c7e9a5e7c8819eb9523a5be6a19e6a21
Cr-Commit-Position: refs/heads/master@{#322372}

[hirono, 2015-03-25 14:21:08]

hirono@chromium.org changed reviewers:
+ fukino@chromium.org

[hirono, 2015-03-25 14:21:08]

PTAL, thanks!

[fukino, 2015-03-26 03:38:33]

lgtm!

[hirono, 2015-03-26 13:02:33]

On 2015/03/26 03:38:33, fukino wrote:
> lgtm!

Thanks!

[hirono, 2015-03-26 13:02:37]

The CQ bit was checked by hirono@chromium.org

[commit-bot: I haz the power, 2015-03-26 13:02:50]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1034713002/1

[commit-bot: I haz the power, 2015-03-26 13:06:38]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-03-26 13:07:22]

Patchset 1 (id:??) landed as
https://crrev.com/e4193786c7e9a5e7c8819eb9523a5be6a19e6a21
Cr-Commit-Position: refs/heads/master@{#322372}