Bug 1334293 - Use the typeName for source and thread actors. r=ochameau

MozReview-Commit-ID: IpreKTT0hrt

--HG--
extra : rebase_source : 5f429b0c93dc18a59603d99d5485a4afbb8063d6

devtools/server/actors/common.js

@@ -235,9 +235,9 @@ ActorPool.prototype = {
   addActor: function APAddActor(actor) {
     actor.conn = this.conn;
     if (!actor.actorID) {
-      let prefix = actor.actorPrefix;
+      // Older style actors use actorPrefix, while protocol.js-based actors use typeName
+      let prefix = actor.actorPrefix || actor.typeName;
       if (!prefix && typeof actor == "function") {
-        // typeName is a convention used with protocol.js-based actors
         prefix = actor.prototype.actorPrefix || actor.prototype.typeName;
       }
       actor.actorID = this.conn.allocID(prefix || undefined);