Fix paint invalidation for SVG with outline-offset

LayoutTests/svg/repaint/outline-offset-shape-expected.txt

 {
   "bounds": [800, 600],
   "children": [
     {
       "bounds": [800, 600],
       "contentsOpaque": true,
       "drawsContent": true,
       "repaintRects": [
-        [8, 108, 210, 210]
+        [148, 33, 100, 100],
+        [133, 18, 130, 130],
+        [33, 33, 100, 100],
+        [18, 18, 130, 130]
       ]
     }
   ]
 }