Add a failure expectation to win memory.css3d test.

Add a failure expectation to win memory.css3d test.

In tile manager we seem to reach the memory limit early (with the
pending tree). However, when we activate our memory gets released
and we start filling it up again with the now active tree tiles.

The windows bot seems to catch the system at the moment when we're not
using a lot of memory, thus failing the test.

BUG=373098
R=kbr@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=270962

[vmpstr, 2014-05-15 22:56:37]

Please take a look.

[Ken Russell (switch to Gerrit), 2014-05-16 03:12:10]

Thanks. LGTM

[Ken Russell (switch to Gerrit), 2014-05-16 03:12:13]

The CQ bit was checked by kbr@chromium.org

[commit-bot: I haz the power, 2014-05-16 03:13:00]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/vmpstr@chromium.org/289003004/1

[commit-bot: I haz the power, 2014-05-16 06:13:22]

FYI, CQ is re-trying this CL (attempt #1).
Please consider checking whether the failures are real,
and report flakes to chrome-troopers@google.com.
The failing builders are:
  win_chromium_rel on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/win_chromium_rel/buil...)

[commit-bot: I haz the power, 2014-05-16 08:07:23]

Change committed as 270962