Remove time getters from AudioBufferQueue and AudioRendererAlgorithm.

Remove time getters from AudioBufferQueue and AudioRendererAlgorithm.

With the switch to pure frame-based calculation of time in 5b6ce11,
these methods are no longer used.

BUG=370634
Committed: https://crrev.com/50687650f80e74d4135f7002c1c1b30f94892b28
Cr-Commit-Position: refs/heads/master@{#292560}

[scherkus (not reviewing), 2014-08-29 00:01:05]

scherkus@chromium.org changed reviewers:
+ dalecurtis@chromium.org

[DaleCurtis, 2014-08-29 00:12:38]

lgtm \o/

[scherkus (not reviewing), 2014-08-29 00:22:47]

The CQ bit was checked by scherkus@chromium.org

[commit-bot: I haz the power, 2014-08-29 00:24:44]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/scherkus@chromium.org/516113002/1

[commit-bot: I haz the power, 2014-08-29 02:06:23]

FYI, CQ is re-trying this CL (attempt #1).
The failing builders are:
  linux_chromium_rel_swarming on tryserver.chromium.linux
(http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)
  win_chromium_x64_rel_swarming on tryserver.chromium.win
(http://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_x64_...)

[commit-bot: I haz the power, 2014-08-29 02:14:13]

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

[commit-bot: I haz the power, 2014-08-29 02:14:14]

Try jobs failed on following builders:
  linux_chromium_rel_swarming on tryserver.chromium.linux
(http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)

[scherkus (not reviewing), 2014-08-29 02:17:25]

The CQ bit was checked by scherkus@chromium.org

[commit-bot: I haz the power, 2014-08-29 02:18:58]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/scherkus@chromium.org/516113002/1

[commit-bot: I haz the power, 2014-08-29 02:57:49]

Committed patchset #1 (id:1) as d52688562228ca818cb838d3dceb0ad2d99cab74

[commit-bot: I haz the power, 2014-09-10 03:05:49]

Patchset 1 (id:??) landed as
https://crrev.com/50687650f80e74d4135f7002c1c1b30f94892b28
Cr-Commit-Position: refs/heads/master@{#292560}