Update comment for SkMallocPixelRef::NewWithProc.
scroggo authored
Add a comment about using a NULL ReleaseProc.

BUG=skia:2185

Review URL: https://codereview.chromium.org/885573005
527b2873
Skia is a complete 2D graphic library for drawing Text, Geometries, and Images.

See full details, and build instructions, at https://sites.google.com/site/skiadocs/home