--- a/devtools/server/actors/reflow.js
+++ b/devtools/server/actors/reflow.js
@@ -465,17 +465,16 @@ ReflowObserver.prototype.QueryInterface 
   .generateQI([Ci.nsIReflowObserver, Ci.nsISupportsWeakReference]);
 
 /**
  * Reports window resize events on the tabActor's windows.
  * @extends Observable
  * @param {TabActor} tabActor
  * @param {Function} callback Executed everytime a resize occurs
  */
-
 class WindowResizeObserver extends Observable {
 
   constructor(tabActor, callback) {
     super(tabActor, callback);
     this.onResize = this.onResize.bind(this);
   }
 
   _startListeners() {