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

third_party/WebKit/LayoutTests/paint/invalidation/compositing/scroll-fixed-layer-no-content-expected.txt

 {
   "name": "Content Root Layer",
   "bounds": [785, 2016],
   "children": [
     {
       "name": "LayoutView #document",
       "bounds": [785, 2016],
       "contentsOpaque": true,
       "drawsContent": true,
       "children": [
         {
           "name": "LayoutBlockFlow (positioned) DIV",
           "position": [100, 200],
           "bounds": [200, 200]
         }
       ]
     }
   ]
 }