Turn on threaded DMQuiltTask drawing for old-format SkPictures too.

Turn on threaded DMQuiltTask drawing for old-format SkPictures too.

This required the same SkBitmap copying that we added today to SkRecord.

BUG=skia:

Committed: https://skia.googlesource.com/skia/+/eeb1f15891ee9f96f2c5d6e1c3d5a656208f3760

[reed1, 2014-07-07 22:43:42]

I think I really liked the helper function you tried earlier. I think that is
clearer for future readers than just a comment above some of the enums.

e.g.

// We need to make a (shallow) copy since bitmaps are not reentrant safe...
SkBitmap shallow_copy(const SkBitmap& bm) { return bm; }

[mtklein, 2014-07-07 22:47:44]

On 2014/07/07 22:43:42, reed1 wrote:
> I think I really liked the helper function you tried earlier. I think that is
> clearer for future readers than just a comment above some of the enums.
> 
> e.g.
> 
> // We need to make a (shallow) copy since bitmaps are not reentrant safe...
> SkBitmap shallow_copy(const SkBitmap& bm) { return bm; }

Done, stole it verbatim.

[reed1, 2014-07-07 22:48:57]

lgtm

[mtklein, 2014-07-07 22:53:06]

The CQ bit was checked by mtklein@google.com

[commit-bot: I haz the power, 2014-07-07 22:53:39]

CQ is trying da patch. Follow status at
 https://skia-tree-status.appspot.com/cq/mtklein@chromium.org/375703002/20001

[commit-bot: I haz the power, 2014-07-07 23:17:41]

Change committed as eeb1f15891ee9f96f2c5d6e1c3d5a656208f3760