Remove media::AudioRendererImpl::now_cb_ and clean up tests (round 2).

Remove media::AudioRendererImpl::now_cb_ and clean up tests (round 2).

It's no longer needed as of r282376.

BUG=370634
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=283443

[scherkus (not reviewing), 2014-07-15 17:57:51]

rileya: can you take another look?

I had to revert since MSVC executed things differently when having the same
function referenced twice in a statement

PS#1 is original
PS#2 is fix

[rileya (GONE FROM CHROMIUM), 2014-07-15 18:31:19]

On 2014/07/15 17:57:51, scherkus wrote:
> rileya: can you take another look?
> 
> I had to revert since MSVC executed things differently when having the same
> function referenced twice in a statement
> 
> PS#1 is original
> PS#2 is fix

Assuming it passes the MSVC bots, lgtm.

[scherkus (not reviewing), 2014-07-15 18:54:18]

The CQ bit was checked by scherkus@chromium.org

[commit-bot: I haz the power, 2014-07-15 18:57:28]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/scherkus@chromium.org/395943002/10001

[commit-bot: I haz the power, 2014-07-16 02:01:24]

FYI, CQ is re-trying this CL (attempt #1).
The failing builders are:
  win_chromium_rel on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/win_chromium_rel/buil...)

[commit-bot: I haz the power, 2014-07-16 04:53:49]

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

[commit-bot: I haz the power, 2014-07-16 04:53:50]

Try jobs failed on following builders:
  win_chromium_rel on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/win_chromium_rel/buil...)

[scherkus (not reviewing), 2014-07-16 16:22:22]

The CQ bit was checked by scherkus@chromium.org

[commit-bot: I haz the power, 2014-07-16 16:24:12]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/scherkus@chromium.org/395943002/10001

[commit-bot: I haz the power, 2014-07-16 18:29:09]

Change committed as 283443