Implement the inert attribute

third_party/WebKit/LayoutTests/platform/linux/inspector-protocol/accessibility/accessibility-ignoredNodes-expected.txt

Index: third_party/WebKit/LayoutTests/platform/linux/inspector-protocol/accessibility/accessibility-ignoredNodes-expected.txt
diff --git a/third_party/WebKit/LayoutTests/platform/linux/inspector-protocol/accessibility/accessibility-ignoredNodes-expected.txt b/third_party/WebKit/LayoutTests/platform/linux/inspector-protocol/accessibility/accessibility-ignoredNodes-expected.txt
index b932ae5638e783ce7c84c4c699ee51b3a8cb4dd8..55f35882072d16609ff8aed202b97a8dd4c69871 100644
--- a/third_party/WebKit/LayoutTests/platform/linux/inspector-protocol/accessibility/accessibility-ignoredNodes-expected.txt
+++ b/third_party/WebKit/LayoutTests/platform/linux/inspector-protocol/accessibility/accessibility-ignoredNodes-expected.txt
@@ -414,3 +414,50 @@ WebArea
   "domNode": "select"
 }
 
+WebArea
+  *Ignored
+{
+  "nodeId": "<string>",
+  "ignored": true,
+  "ignoredReasons": [
+    {
+      "name": "inertElement",
+      "value": {
+        "type": "boolean",
+        "value": true
+      }
+    }
+  ],
+  "role": {
+    "type": "internalRole",
+    "value": "Ignored"
+  },
+  "domNode": "button"
+}
+
+WebArea
+  *Ignored
+{
+  "nodeId": "<string>",
+  "ignored": true,
+  "ignoredReasons": [
+    {
+      "name": "inertSubtree",
+      "value": {
+        "type": "idref",
+        "relatedNodes": [
+          {
+            "idref": "inert-root",
+            "nodeResult": "div#inert-root"
+          }
+        ]
+      }
+    }
+  ],
+  "role": {
+    "type": "internalRole",
+    "value": "Ignored"
+  },
+  "domNode": "button"
+}
+