Gallery: Remove position: absolute; line for redo button.

Gallery: Remove position: absolute; line for redo button.

The line is specified for the hidden redu button does not affect layout of other
buttons, but it removes the button from the layout even if the button is
visible, and it causes overlapping of the buttons.  Actually we can remove the
line because hidden items are specified display: none; in Gallery.

BUG=450186
TEST=None

Committed: https://crrev.com/b170090d45fe82f30bdd7953862c3c6168c94f03
Cr-Commit-Position: refs/heads/master@{#313661}

[hirono, 2015-01-29 03:23:50]

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

[hirono, 2015-01-29 03:23:50]

PTAL? Thansk!

[fukino, 2015-01-29 03:26:05]

lgtm

[hirono, 2015-01-29 03:32:59]

The CQ bit was checked by hirono@chromium.org

[commit-bot: I haz the power, 2015-01-29 03:33:36]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/866893004/1

[commit-bot: I haz the power, 2015-01-29 03:52:51]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-01-29 03:53:55]

Patchset 1 (id:??) landed as
https://crrev.com/b170090d45fe82f30bdd7953862c3c6168c94f03
Cr-Commit-Position: refs/heads/master@{#313661}