SkOnce: let f be any functor, update comments

SkOnce: let f be any functor, update comments

BUG=

Committed: http://code.google.com/p/skia/source/detail?r=12518

[mtklein, 2013-12-04 19:50:51]

Think you can use this for SkPixelRef::getImageInfo?

[mtklein, 2013-12-05 15:50:24]

Looks like we won't need the power user API just yet.  Here are some little
tweaks I noticed while writing that first version that are still worthwhile.

[mtklein, 2013-12-05 16:18:23]

On 2013/12/05 15:50:24, mtklein wrote:
> Looks like we won't need the power user API just yet.  Here are some little
> tweaks I noticed while writing that first version that are still worthwhile.

Sorry, new patch up.  I didn't give myself a way to initialize manual
SkOnceFlags.

[bungeman-skia, 2013-12-05 16:36:28]

lgtm, though the difference between the static macro and not having a macro for
non-static declaration is a bit, well, different. Not sure which I actually like
better.

[mtklein, 2013-12-05 18:43:42]

On 2013/12/05 16:36:28, bungeman1 wrote:
> lgtm, though the difference between the static macro and not having a macro
for
> non-static declaration is a bit, well, different. Not sure which I actually
like
> better.

agreed.  I might get rid of the macro now.

[commit-bot: I haz the power, 2013-12-05 18:44:32]

CQ is trying da patch. Follow status at
https://skia-tree-status.appspot.com/cq/mtklein@google.com/104433005/40001

[commit-bot: I haz the power, 2013-12-05 19:20:53]

Change committed as 12518