Use module.exports rather than this.exports

sky/framework/inspector/dom-agent.sky

 <script>
 function DOMAgent(delegate) {
   this.enabled = false;
   this.delegate_ = delegate;
   this.nextNodeId_ = 1;
   this.nodeToId_ = new Map();
   this.idToNode_ = new Map();
 }
 
 DOMAgent.prototype.getIdForNode_ = function(node) {
@@ skipping 143 matching lines @@
         this.delegate_.sendMessage("DOM.childNodeInserted", {
           parentNodeId: nodeId,
           previousNodeId: previousNodeId,
           node: this.serializeNode_(node),
         });
       }.bind(this));
     }
   }
 };
 
-this.exports = DOMAgent;
+module.exports = DOMAgent;
 </script>