Show reasons why nodes are ignored in accessibility sidebar

Source/devtools/protocol.json

 {
     "version": { "major": "1", "minor": "1" },
     "domains": [{
         "domain": "Inspector",
         "hidden": true,
         "types": [],
         "commands": [
             {
                 "name": "enable",
                 "description": "Enables inspector domain notifications."
@@ skipping 5067 matching lines @@
                 "enum": [ "checked", "expanded", "pressed", "selected" ],
                 "description": "States which apply to widgets."
             },
             {
                 "id": "AXRelationshipAttributes",
                 "type": "string",
                 "enum": [ "activedescendant", "flowto", "controls", "describedby", "labelledby", "owns" ],
                 "description": "Relationships between elements other than parent/child/sibling."
             },
             {
+                "id": "AXIgnoredReasons",
+                "type": "string",
+                "enum": [ "activeModalDialog", "ancestorDisallowsChild", "ancestorIsLeafNode", "ariaHidden", "ariaHiddenRoot", "emptyAlt", "emptyText", "inheritsPresentation", "labelContainer", "labelFor", "notRendered", "notVisible", "probablyPresentational", "staticTextUsedAsNameFor", "uninteresting" ],
+                "description": "Enum of possible reasons why a node could be ignored for accessibility."
+            },
+            {
                 "id": "AXNode",
                 "type": "object",
                 "properties": [
                     { "name": "nodeId", "$ref": "AXNodeId", "description": "Unique identifier for this node." },
-                    { "name": "role", "$ref": "AXValue", "description": "This <code>Node</code>'s role, whether explicit or implicit." },
+                    { "name": "ignored", "type": "boolean", "description": "Whether this node is ignored for accessibility" },
+                    { "name": "ignoredReasons", "type": "array", "items": { "$ref": "AXProperty" }, "description": "Collection of reasons why this node is hidden.", "optional": true },
+                    { "name": "role", "$ref": "AXValue", "description": "This <code>Node</code>'s role, whether explicit or implicit.", "optional": true},
                     { "name": "name", "$ref": "AXValue", "description": "The accessible name for this <code>Node</code>.", "optional": true },
                     { "name": "description", "$ref": "AXValue", "description": "The accessible description for this <code>Node</code>.", "optional": true },
                     { "name": "value", "$ref": "AXValue", "description": "The value for this <code>Node</code>.", "optional": true },
                     { "name": "help", "$ref": "AXValue", "description": "Help.", "optional": true },
-                    { "name": "properties", "type": "array", "items": { "$ref": "AXProperty" }, "description": "All other properties" }
+                    { "name": "properties", "type": "array", "items": { "$ref": "AXProperty" }, "description": "All other properties", "optional": true }
                 ],
                 "description": "A node in the accessibility tree."
             }
         ],
         "commands": [
             {
                 "name": "getAXNode",
                 "parameters": [
                     { "name": "nodeId", "$ref": "DOM.NodeId", "description": "ID of node to get accessibility node for." }
                 ],
                 "returns": [
                     { "name": "accessibilityNode", "$ref": "AXNode", "description": "The <code>Accessibility.AXNode</code> for this DOM node, if it exists.", "optional": true }
                 ],
                 "description": "Fetches the accessibility node for this DOM node, if it exists.",
                 "hidden": true
             }
         ]
     }]
 }