Give up on threaded animations for the Mac App Launcher NSWindow

Give up on threaded animations for the Mac App Launcher NSWindow

AppKit ignores -[NSView canDrawConcurrently:] and invokes redraws on the
animation thread.

The last attempt to make one part safe was r296591. However,
http://crbug.com/421952 links to undiagnosable crashes within AppKit
from a build at r298667. These are likely race conditions due to this
threading.

The downside is just that, when Chrome is not running, the initial
appearance of the app launcher window will be a bit delayed, and will
just "pop" in, rather than animate.

BUG=421952
Committed: https://crrev.com/7e2712889cc4ca1f62c7305b96a971b50abdf621
Cr-Commit-Position: refs/heads/master@{#299268}

[tapted, 2014-10-13 06:24:52]

tapted@chromium.org changed reviewers:
+ jackhou@chromium.org

[tapted, 2014-10-13 06:25:23]

Hi Jack, PTAL

[jackhou1, 2014-10-13 06:29:08]

lgtm

[tapted, 2014-10-13 06:32:58]

The CQ bit was checked by tapted@chromium.org

[commit-bot: I haz the power, 2014-10-13 06:33:21]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/646353002/1

[commit-bot: I haz the power, 2014-10-13 06:59:42]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2014-10-13 07:00:25]

Patchset 1 (id:??) landed as
https://crrev.com/7e2712889cc4ca1f62c7305b96a971b50abdf621
Cr-Commit-Position: refs/heads/master@{#299268}