setting up a drawiter and counting the layers. git-svn-id: http://skia.googlecode.com/svn/trunk@2875 2bbb7eff-a529-9590-31e7-b0007b416f81
git-svn-id: http://skia.googlecode.com/svn/trunk@2751 2bbb7eff-a529-9590-31e7-b0007b416f81