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

third_party/WebKit/LayoutTests/inspector-protocol/accessibility/accessibility-nameSources-img-figure-expected.txt

+
 {
   "nodeId": "<string>",
   "ignored": false,
   "role": {
     "type": "role",
     "value": "figure"
   },
   "name": {
     "type": "computedString",
     "value": "",
@@ skipping 630 matching lines @@
             "text": "svg1-title",
             "nodeResult": "title"
           }
         ]
       }
     }
   ],
   "domNode": "svg#svg1"
 }