Web Inspector: Integrate new regionOversetChange event into inspector

Source/devtools/protocol.json

Index: Source/devtools/protocol.json
diff --git a/Source/devtools/protocol.json b/Source/devtools/protocol.json
index 3737d022935002a97a5b2041890145946af52ef2..2a4a4b0388652d384420d25fee161149f5a25fbd 100644
--- a/Source/devtools/protocol.json
+++ b/Source/devtools/protocol.json
@@ -2663,6 +2663,14 @@
                 ],
                 "description": "Fires when a Named Flow's layout may have changed.",
                 "hidden": true
+            },
+            {
+                "name": "regionOversetChanged",
+                "parameters": [
+                    { "name": "namedFlow", "$ref": "NamedFlow", "description": "The Named Flow containing the regions whose regionOverset values changed." }
+                ],
+                "description": "Fires if any of the regionOverset values changed in a Named Flow's region chain.",
+                "hidden": true
             }
         ]
     },