Change SkLightingImageFilter to derive from SkSingleInputImageFilter, so that it can participate in filter DAGs.

No tests yet.

Review URL: https://codereview.appspot.com/6620055

git-svn-id: http://skia.googlecode.com/svn/trunk@5832 2bbb7eff-a529-9590-31e7-b0007b416f81
2 files changed