Bug 1145049 - Clean inspector on detach/disconnect. r=pbrosset

toolkit/devtools/server/actors/inspector.js

@@ -3312,6 +3312,18 @@ var InspectorActor = exports.InspectorActor = protocol.ActorClass({
     this.tabActor = tabActor;
   },
 
+  destroy: function () {
+    protocol.Actor.prototype.destroy.call(this);
+    this._highlighterPromise = null;
+    this._pageStylePromise = null;
+    this._walkerPromise = null;
+    this.tabActor = null;
+  },
+
+  disconnect: function () {
+    this.destroy();
+  },
+
   get window() this.tabActor.window,
 
   getWalker: method(function(options={}) {