Suppress data races on FLAGS_quic_attach_ack_notifiers_to_packets

Suppress data races on FLAGS_quic_attach_ack_notifiers_to_packets

BUG=448688
TBR=rtenneti@chromium.org
NOTRY=true

Committed: https://crrev.com/5635a13b7f50b34afd29688002ef85ba6a00af0f
Cr-Commit-Position: refs/heads/master@{#311447}

[Alexander Potapenko, 2015-01-14 10:17:28]

TBR

[Alexander Potapenko, 2015-01-14 10:18:08]

The CQ bit was checked by glider@chromium.org

[Alexander Potapenko, 2015-01-14 10:18:21]

The CQ bit was unchecked by glider@chromium.org

[Alexander Potapenko, 2015-01-14 10:18:22]

The CQ bit was checked by glider@chromium.org

[commit-bot: I haz the power, 2015-01-14 10:19:08]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/832583004/1

[commit-bot: I haz the power, 2015-01-14 10:30:02]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-01-14 10:31:05]

Patchset 1 (id:??) landed as
https://crrev.com/5635a13b7f50b34afd29688002ef85ba6a00af0f
Cr-Commit-Position: refs/heads/master@{#311447}

[ramant (doing other things), 2015-01-15 02:40:08]

Missed the race. Fixed it in https://codereview.chromium.org/849123003/

LGTM

[ramant (doing other things), 2015-01-16 01:51:08]

A revert of this CL (patchset #1 id:1) has been created in
https://codereview.chromium.org/856673002/ by rtenneti@chromium.org.

The reason for reverting is: This bug is fixed in the following release.
Reverting this change.

https://codereview.chromium.org/849123003/.