Revert animation of Overview Button Tray

Revert animation of Overview Button Tray
Initial change has a race condition that can cause the system tray and other items to become, and stay visible. Reverting to unblock dev.

Revert "Animate the OverviewButtonTray"

This reverts commit f2eb09cd51c6c3dec830abd6613c0df130b7c08f.

Original review: https://codereview.chromium.org/251193004/
TBR=oshima@chromium.org
BUG=372285
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=270189

[jonross, 2014-05-13 17:35:16]

Revert due to a race condition to unblock dev branch. Will develop a fix to
reland later.

[jonross, 2014-05-13 17:36:41]

The CQ bit was checked by jonross@chromium.org

[commit-bot: I haz the power, 2014-05-13 17:37:48]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/jonross@chromium.org/281793002/1

[commit-bot: I haz the power, 2014-05-13 17:37:50]

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

[commit-bot: I haz the power, 2014-05-13 17:37:50]

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.

[flackr, 2014-05-13 17:59:31]

lgtm

[jonross, 2014-05-13 17:59:41]

The CQ bit was checked by jonross@chromium.org

[commit-bot: I haz the power, 2014-05-13 18:00:29]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/jonross@chromium.org/281793002/1

[commit-bot: I haz the power, 2014-05-13 20:31:39]

Change committed as 270189

[oshima, 2014-05-14 00:43:14]

On 2014/05/13 20:31:39, I haz the power (commit-bot) wrote:
> Change committed as 270189

tip: drover --revert 269378
is easier (at least for me)