[DevTools] Move inspector-protocol/accessibility tests to new harness

third_party/WebKit/LayoutTests/inspector-protocol/accessibility/accessibility-ignoredNodesModal-expected.txt

-Hidden by modal dialog
-(Dialog itself is not hidden)
-Non-hidden element inside dialog
+
 {
   "nodeId": "<string>",
   "ignored": true,
   "ignoredReasons": [
     {
       "name": "activeModalDialog",
       "value": {
         "type": "idref",
         "relatedNodes": [
           {
@@ skipping 67 matching lines @@
       {
         "type": "attribute",
         "attribute": "title"
       }
     ]
   },
   "properties": [],
   "domNode": "div"
 }