Add a new prefer_aes finch options for QUIC.

Add a new prefer_aes finch options for QUIC.

Committed: https://crrev.com/9976b0c7309301acc2d115c3b3856613948488fb
Cr-Commit-Position: refs/heads/master@{#333805}

[Ryan Hamilton, 2015-06-09 01:14:32]

rch@chromium.org changed reviewers:
+ rtenneti@chromium.org

[ramant (doing other things), 2015-06-09 12:19:43]

lgtm

[Ryan Hamilton, 2015-06-09 22:18:05]

The CQ bit was checked by rch@chromium.org

[commit-bot: I haz the power, 2015-06-09 22:20:27]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1165283004/1

[commit-bot: I haz the power, 2015-06-09 23:40:16]

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

[commit-bot: I haz the power, 2015-06-09 23:40:17]

Try jobs failed on following builders:
  mac_chromium_compile_dbg_ng on tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/mac_chromium_comp...)

[Ryan Hamilton, 2015-06-10 20:14:02]

The CQ bit was checked by rch@chromium.org

[Ryan Hamilton, 2015-06-10 20:14:03]

The patchset sent to the CQ was uploaded after l-g-t-m from
rtenneti@chromium.org
Link to the patchset: https://codereview.chromium.org/1165283004/#ps20001
(title: "Rebase")

[commit-bot: I haz the power, 2015-06-10 20:14:14]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1165283004/20001

[commit-bot: I haz the power, 2015-06-10 21:27:30]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-06-10 21:29:17]

Patchset 2 (id:??) landed as
https://crrev.com/9976b0c7309301acc2d115c3b3856613948488fb
Cr-Commit-Position: refs/heads/master@{#333805}