QUIC - Android - small experiment to flush http_server_properties

QUIC - Android - small experiment to flush http_server_properties
changes to disk every 500ms instead of 5secs. We are hoping if QUIC is
used as an alternate protocol, we will persist that information to disk
quicker. Hopefully, this would improve the QUIC winning the alternate
protocol race.

R=rch@chromium.org

Committed: https://crrev.com/708a3ef67431831c2a29aa35202fa446011020b4
Cr-Commit-Position: refs/heads/master@{#300318}

[Ryan Hamilton, 2014-10-20 17:51:49]

lgtm

[ramant (doing other things), 2014-10-20 17:56:46]

The CQ bit was checked by rtenneti@chromium.org

[commit-bot: I haz the power, 2014-10-20 17:57:55]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/667473003/1

[commit-bot: I haz the power, 2014-10-20 19:49:56]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2014-10-20 19:50:35]

Patchset 1 (id:??) landed as
https://crrev.com/708a3ef67431831c2a29aa35202fa446011020b4
Cr-Commit-Position: refs/heads/master@{#300318}

[ramant (doing other things), 2014-11-26 01:43:59]

A revert of this CL (patchset #1 id:1) has been created in
https://codereview.chromium.org/754563004/ by rtenneti@chromium.org.

The reason for reverting is: We have found out that this change is not needed.
When QUIC enabled experiment is used, we are persisting Alternate Protocol
information properly (we don't see high percentage of missing alternate
protocols)..