Fixing parameter names in AudioDirectiveHandler

Fixing parameter names in AudioDirectiveHandler. These TTLs have their units built in. Thus it's redundant and confusing to add _ms on the end.

Committed: https://crrev.com/c90da078f23d29eb450c7a94824d6f658fbb3cee
Cr-Commit-Position: refs/heads/master@{#303556}

[Charlie, 2014-11-10 23:00:44]

ckehoe@chromium.org changed reviewers:
+ rkc@chromium.org

[rkc, 2014-11-11 00:02:10]

lgtm

[rkc, 2014-11-11 00:02:14]

The CQ bit was checked by rkc@chromium.org

[commit-bot: I haz the power, 2014-11-11 00:04:26]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/712993007/1

[commit-bot: I haz the power, 2014-11-11 01:01:14]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2014-11-11 01:01:48]

Patchset 1 (id:??) landed as
https://crrev.com/c90da078f23d29eb450c7a94824d6f658fbb3cee
Cr-Commit-Position: refs/heads/master@{#303556}