Should not hurt features (we hope), but is an easy way to survive malicious
values on a small-memory machine like a handset.
git-svn-id: http://skia.googlecode.com/svn/trunk@123 2bbb7eff-a529-9590-31e7-b0007b416f81
pattern: the receiver will call ref() if it chooses when passed to a constructor
or setter, so the caller must balance its ownership itself. This matches how all
other refcnt objects are handled.
git-svn-id: http://skia.googlecode.com/svn/trunk@120 2bbb7eff-a529-9590-31e7-b0007b416f81
reed@android.com