Don't cache the IO thread in the MetricsService

Don't cache the IO thread in the MetricsService

BUG=none
TEST=none


Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=132920

[ramant (doing other things), 2012-04-18 21:42:41]

lgtm

[commit-bot: I haz the power, 2012-04-18 21:45:32]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/isherman@chromium.org/10117034/1

[commit-bot: I haz the power, 2012-04-18 22:06:44]

Try job failure for 10117034-1 (retry) on linux_chromeos for step "compile"
(clobber build).
It's a second try, previously, step "compile" failed.
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=linux_chro...

[commit-bot: I haz the power, 2012-04-18 22:09:15]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/isherman@chromium.org/10117034/1

[commit-bot: I haz the power, 2012-04-18 22:34:15]

Try job failure for 10117034-1 (retry) on linux_chromeos for step "compile"
(clobber build).
It's a second try, previously, step "compile" failed.
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=linux_chro...

[commit-bot: I haz the power, 2012-04-18 23:33:49]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/isherman@chromium.org/10117034/4004

[jar (doing other things), 2012-04-19 02:33:25]

lgtm

[commit-bot: I haz the power, 2012-04-19 02:36:09]

Change committed as 132920