Dirty nearby lineboxes if we layout a float rather than trying to work it out later

LayoutTests/platform/linux/fast/repaint/line-flow-with-floats-3-expected.txt

 {
   "bounds": [800, 600],
   "children": [
     {
       "bounds": [800, 600],
       "contentsOpaque": true,
       "drawsContent": true,
       "repaintRects": [
         [372, 383, 48, 80],
         [356, 383, 64, 80],
         [352, 440, 16, 59],
         [352, 380, 1, 19],
         [303, 420, 66, 19],
         [65, 400, 288, 39],
         [65, 380, 304, 59],
         [14, 420, 339, 39],
-        [8, 380, 418, 219]
+        [8, 340, 418, 259]
       ]
     }
   ]
 }