Slightly improve visuals of bitmapscroll test in gm
Slightly improve visuals of bitmapscroll test in gm

git-svn-id: e8541e15acce502a64c929015570ad1648e548cd@1949 2bbb7eff-a529-9590-31e7-b0007b416f81

mrobinson/skia,mrobinson/skia,mrobinson/skia,metajack/skia,metajack/skia,metajack/skia,Cue/skia,Cue/skia,mrobinson/skia,Cue/skia,mrobinson/skia,metajack/skia,Cue/skia