[Devtools] Allow User-Agent header override for Websockets

third_party/WebKit/Source/devtools/protocol.json

 {
     "version": { "major": "1", "minor": "1" },
     "domains": [{
         "domain": "Inspector",
         "hidden": true,
         "types": [],
         "commands": [
             {
                 "name": "enable",
                 "description": "Enables inspector domain notifications.",
@@ skipping 1432 matching lines @@
                     { "name": "maxResourceBufferSize", "type": "integer", "optional": true, "hidden": true, "description": "Per-resource buffer size in bytes to use when preserving network payloads (XHRs, etc)." }
                 ]
             },
             {
                 "name": "disable",
                 "description": "Disables network tracking, prevents network events from being sent to the client."
             },
             {
                 "name": "setUserAgentOverride",
                 "description": "Allows overriding user agent with the given string.",
+                "handlers": ["browser", "renderer"],
                 "parameters": [
                     { "name": "userAgent", "type": "string", "description": "User agent to use." }
                 ]
             },
             {
                 "name": "setExtraHTTPHeaders",
                 "description": "Specifies whether to always send extra HTTP headers with the requests from this page.",
                 "parameters": [
                     { "name": "headers", "$ref": "Headers", "description": "Map with extra HTTP headers." }
                 ]
@@ skipping 3695 matching lines @@
                 "parameters": [
                     { "name": "origin", "type": "string", "description": "Security origin." },
                     { "name": "storageTypes", "type": "string", "description": "Comma separated origin names." }
                 ],
                 "description": "Clears storage for origin.",
                 "handlers": ["browser"]
             }
         ]
     }]
 }