Add neutral as a SecurityState in the Security domain. (1/4)

Source/devtools/protocol.json

 {
     "version": { "major": "1", "minor": "1" },
     "domains": [{
         "domain": "Inspector",
         "hidden": true,
         "types": [],
         "commands": [
             {
                 "name": "enable",
                 "description": "Enables inspector domain notifications.",
@@ skipping 1065 matching lines @@
         ]
     },
     {
         "domain": "Security",
         "description": "Security",
         "hidden": true,
         "types": [
             {
                 "id": "SecurityState",
                 "type": "string",
-                "enum": ["unknown", "http", "insecure", "warning", "secure"],
+                "enum": ["unknown", "http", "neutral", "insecure", "warning", "secure"],
                 "description": "The security level of a page or resource."
             },
             {
                 "id": "SecurityStateExplanation",
                 "type": "object",
                 "properties": [
                     { "name": "securityState", "$ref": "SecurityState", "description": "Security state representing the severity of the factor being explained." },
                     { "name": "summary", "type": "string", "description": "Short phrase describing the type of factor." },
                     { "name": "description", "type": "string", "description": "Full text explanation of the factor." }
                 ],
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                 ],
                 "returns": [
                     { "name": "accessibilityNode", "$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
             }
         ]
     }]
 }