use new SkDrawTreatAsHairline method to decide when to approximate a thin-line
with a hairline (and have its alpha modulated).

idea is to be able to share this new function with SkGpuDevice



git-svn-id: http://skia.googlecode.com/svn/trunk@2283 2bbb7eff-a529-9590-31e7-b0007b416f81
2 files changed