Disable edit and print button when there is no selection.

Disable edit and print button when there is no selection.

BUG=421767
TEST=Open Gallery.app; In slide mode, delete all images by clicking bottom-right delete button.

Committed: https://crrev.com/5938395e0b1ff3ce9b540fa1efeded2d554d0052
Cr-Commit-Position: refs/heads/master@{#299057}

[yawano, 2014-10-09 10:47:26]

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

[yawano, 2014-10-09 10:47:26]

PTAL.

[yawano, 2014-10-10 00:42:42]

Added a patch set. PTAL. Thanks.

[hirono, 2014-10-10 02:28:17]

Thank you, LGTM!

[yawano, 2014-10-10 03:49:10]

The CQ bit was checked by yawano@chromium.org

[commit-bot: I haz the power, 2014-10-10 03:50:25]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/638383002/20001

[commit-bot: I haz the power, 2014-10-10 04:31:39]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2014-10-10 04:32:16]

Patchset 2 (id:??) landed as
https://crrev.com/5938395e0b1ff3ce9b540fa1efeded2d554d0052
Cr-Commit-Position: refs/heads/master@{#299057}