Bug 859372 - Fix for root.js refactor;r=past

toolkit/devtools/server/actors/root.js

@@ -6,6 +6,7 @@
 
 "use strict";
 
+const { Ci } = require("chrome");
 const Services = require("Services");
 const { ActorPool, appendExtraActors, createExtraActors } = require("devtools/server/actors/common");
 const { DebuggerServer } = require("devtools/server/main");