Support Dart debugger API directly

tools/dom/dom.json

 {
   "ANGLEInstancedArrays": {
     "members": {
       "VERTEX_ATTRIB_ARRAY_DIVISOR_ANGLE": {
         "support_level": "untriaged"
       },
       "drawArraysInstancedANGLE": {
         "support_level": "untriaged"
       },
       "drawElementsInstancedANGLE": {
@@ skipping 5855 matching lines @@
   },
   "ImageData": {
     "comment": "http://www.whatwg.org/specs/web-apps/current-work/multipage/the-canvas-element.html#imagedata",
     "members": {
       "data": {},
       "height": {},
       "width": {}
     },
     "support_level": "stable"
   },
+  "InjectedScriptHost": {
+    "members": {
+      "inspect": {
+        "support_level": "untriaged"
+      }
+    },
+    "support_level": "untriaged"
+  },
   "InputMethodContext": {
     "comment": "http://www.w3.org/TR/ime-api/#idl-def-InputMethodContext",
     "members": {
       "addEventListener": {
         "support_level": "untriaged"
       },
       "composition": {},
       "compositionEndOffset": {
         "support_level": "untriaged"
       },
@@ skipping 8564 matching lines @@
       "importStylesheet": {},
       "removeParameter": {},
       "reset": {},
       "setParameter": {},
       "transformToDocument": {},
       "transformToFragment": {}
     },
     "support_level": "nonstandard"
   }
 }