Add a DevTools Security domain to protocol.json.

Source/devtools/protocol.json

 {
     "version": { "major": "1", "minor": "1" },
     "domains": [{
         "domain": "Inspector",
         "hidden": true,
         "types": [],
         "commands": [
             {
                 "name": "enable",
                 "description": "Enables inspector domain notifications.",
@@ skipping 1039 matching lines @@
                 "description": "Is not issued. Will be gone in the future versions of the protocol.",
                 "deprecated": true
             },
             {
                 "name": "messagesCleared",
                 "description": "Issued when console is cleared. This happens either upon <code>clearMessages</code> command or after page navigation."
             }
         ]
     },
     {
+        "domain": "Security",
+        "description": "Security",
+        "hidden": true,
+        "types": [
+            {
+                "id": "SecurityState",
+                "type": "string",
+                "enum": ["unknown", "http", "insecure", "warning", "secure"],

[lgarron, 2015/06/09 20:18:27]

Added "unknown", since the security handler can technically send that value.

+                "description": "The security level of a page or resource."
+            }
+        ],
+        "commands": [
+            {
+                "name": "enable",
+                "description": "Enables tracking security state changes.",
+                "handlers": ["browser"]
+            },
+            {
+                "name": "disable",
+                "description": "Disables tracking security state changes.",
+                "handlers": ["browser"]
+            }
+        ],
+        "events": [
+            {
+                "name": "securityStateChanged",
+                "description": "The security state of the page changed.",
+                "parameters": [
+                    { "name": "securityState", "$ref": "SecurityState", "description": "Security state." }
+                ],
+                "handlers": ["browser"]
+            }
+        ]
+    },
+    {
         "domain": "Network",
         "description": "Network domain allows tracking network activities of the page. It exposes information about http, file, data and other requests and responses, their headers, bodies, timing, etc.",
         "types": [
             {
                 "id": "LoaderId",
                 "type": "string",
                 "description": "Unique loader identifier."
             },
             {
                 "id": "RequestId",
@@ skipping 3880 matching lines @@
                 ],
                 "returns": [
                     { "name": "accessibilityNode", "$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
             }
         ]
     }]
 }