Add ui devtools server

ui/devtools/protocol.json

Index: ui/devtools/protocol.json
diff --git a/ui/devtools/protocol.json b/ui/devtools/protocol.json
new file mode 100644
index 0000000000000000000000000000000000000000..3e4af011c8034ebfcfe9f8ef9c83ee837601eeb1
--- /dev/null
+++ b/ui/devtools/protocol.json
@@ -0,0 +1,97 @@
+{
+    "domains": [
+        {
+            "commands": [
+                {
+                    "description": "Enables DOM agent for the given page.",
+                    "name": "enable"
+                },
+                {
+                    "description": "Disables DOM agent for the given page.",
+                    "name": "disable"
+                },
+                {
+                    "description": "Returns the root DOM node to the caller.",
+                    "name": "getDocument",
+                    "returns": [
+                        {
+                            "$ref": "Node",
+                            "description": "Resulting node.",
+                            "name": "root"
+                        }
+                    ]
+                }
+            ],
+            "domain": "DOM",
+            "types": [
+                {
+                    "description": "Unique DOM node identifier.",
+                    "id": "NodeId",
+                    "type": "integer"
+                },
+                {
+                    "description": "DOM interaction is implemented in terms of mirror objects that represent the actual DOM nodes. DOMNode is a base node mirror type.",
+                    "id": "Node",
+                    "properties": [
+                        {
+                            "$ref": "NodeId",
+                            "description": "Node identifier that is passed into the rest of the DOM messages as the <code>nodeId</code>. Backend will only push node with given <code>id</code> once. It is aware of all requested nodes and will only fire DOM events for nodes known to the client.",
+                            "name": "nodeId"
+                        },
+                        {
+                            "description": "<code>Node</code>'s nodeType.",
+                            "name": "nodeType",
+                            "type": "integer"
+                        },
+                        {
+                            "description": "<code>Node</code>'s nodeName.",
+                            "name": "nodeName",
+                            "type": "string"
+                        },
+                        {
+                            "description": "Child count for <code>Container</code> nodes.",
+                            "name": "childNodeCount",
+                            "optional": true,
+                            "type": "integer"
+                        },
+                        {
+                            "description": "Child nodes of this node when requested with children.",
+                            "items": {
+                                "$ref": "Node"
+                            },
+                            "name": "children",
+                            "optional": true,
+                            "type": "array"
+                        },
+                        {
+                            "description": "Attributes of the <code>Element</code> node in the form of flat array <code>[name1, value1, name2, value2]</code>.",
+                            "items": {
+                                "type": "string"
+                            },
+                            "name": "attributes",
+                            "optional": true,
+                            "type": "array"
+                        },
+                        {
+                            "description": "<code>Attr</code>'s name.",
+                            "name": "name",
+                            "optional": true,
+                            "type": "string"
+                        },
+                        {
+                            "description": "<code>Attr</code>'s value.",
+                            "name": "value",
+                            "optional": true,
+                            "type": "string"
+                        }
+                    ],
+                    "type": "object"
+                }
+            ]
+        }
+    ],
+    "version": {
+        "major": "1",
+        "minor": "0"
+    }
+}