Fix LayoutState for relatively positioned inlines

LayoutTests/fast/repaint/layoutstate-invalid-invalidation-inline-relative-positioned-expected.txt

 {
   "bounds": [800, 600],
   "children": [
     {
       "bounds": [800, 600],
       "contentsOpaque": true,
       "drawsContent": true,
       "repaintRects": [
-        [1, 50, 314, 200],
-        [1, 50, 314, 200]
+        [8, 220, 100, 100],
+        [8, 200, 100, 100],
+        [8, 40, 784, 104]
       ]
     }
   ]
 }