Remove SkBenchmark::postDraw.

Remove SkBenchmark::postDraw.

Only one bench used this feature, and it's for things that'd be done by the
destructor anyway.

BUG=skia:

Committed: https://skia.googlesource.com/skia/+/683e90611c8a536c3c5feedea27bbbefedf746d2

[bsalomon, 2014-06-18 13:29:49]

On 2014/06/17 21:30:00, mtklein_C wrote:

Are bench objects destroyed after they're run? I wonder if more of our benches
should be using this to free large allocations after they're run.

[mtklein, 2014-06-18 13:34:32]

On 2014/06/18 13:29:49, bsalomon wrote:
> On 2014/06/17 21:30:00, mtklein_C wrote:
> 
> Are bench objects destroyed after they're run? I wonder if more of our benches
> should be using this to free large allocations after they're run.

Yep, benchmain.cpp:533.  They're held in an SkAutoTUnref.

[mtklein, 2014-06-18 13:35:03]

On 2014/06/18 13:34:32, mtklein wrote:
> On 2014/06/18 13:29:49, bsalomon wrote:
> > On 2014/06/17 21:30:00, mtklein_C wrote:
> > 
> > Are bench objects destroyed after they're run? I wonder if more of our
benches
> > should be using this to free large allocations after they're run.
> 
> Yep, benchmain.cpp:533.  They're held in an SkAutoTUnref.

Don't know where I got that line.  It's line 456.

[bsalomon, 2014-06-18 13:44:42]

lgtm

[mtklein, 2014-06-18 13:52:55]

The CQ bit was checked by mtklein@google.com

[commit-bot: I haz the power, 2014-06-18 13:53:10]

CQ is trying da patch. Follow status at
 https://skia-tree-status.appspot.com/cq/mtklein@chromium.org/329853007/1

[mtklein, 2014-06-18 14:00:59]

The CQ bit was checked by mtklein@google.com

[commit-bot: I haz the power, 2014-06-18 14:01:07]

CQ is trying da patch. Follow status at
 https://skia-tree-status.appspot.com/cq/mtklein@chromium.org/329853007/20001

[commit-bot: I haz the power, 2014-06-18 14:15:54]

Change committed as 683e90611c8a536c3c5feedea27bbbefedf746d2