Move repaint tests (except for svg/) to paint/invalidation

third_party/WebKit/LayoutTests/platform/android/paint/invalidation/scrollbar-parts-expected.txt

 {
   "bounds": [800, 600],
   "children": [
     {
       "bounds": [800, 600],
       "contentsOpaque": true,
       "drawsContent": true,
       "repaintRects": [
         [93, 8, 15, 85],
         [8, 93, 85, 15]
       ],
       "paintInvalidationClients": [
         "HorizontalScrollbar",
         "VerticalScrollbar"
       ]
     }
   ]
 }