Add the ability to return descedant event listeners.

third_party/WebKit/Source/devtools/front_end/sdk/RemoteObject.js

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 554 matching lines @@
             this.callFunctionPromise(nodeRemoveEventListener).then(storeRemoveFunction.bind(this));
 
             /**
              * @param {!WebInspector.CallFunctionResult} result
              * @this {WebInspector.RemoteObject}
              */
             function storeRemoveFunction(result)
             {
                 if (!result.wasThrown && result.object)
                     removeFunction = result.object;
-                this.target().domdebuggerAgent().getEventListeners(this._objectId, mycallback.bind(this));
+                this.target().domdebuggerAgent().getEventListeners(this._objectId, false, mycallback.bind(this));

[pfeldman, 2016/06/01 22:40:30]

UI should pass the option here.

             }
 
             /**
              * @this {!WebInspector.RemoteObject}
              * @param {?Protocol.Error} error
              * @param {!Array<!DOMDebuggerAgent.EventListener>} payloads
              */
             function mycallback(error, payloads)
             {
                 if (error) {
@@ skipping 1073 matching lines @@
     {
         if (!this._cachedDescription) {
             var children = this._children();
             this._cachedDescription = "{" + this._formatValue(children[0].value) + " => " + this._formatValue(children[1].value) + "}";
         }
         return this._cachedDescription;
     },
 
     __proto__: WebInspector.LocalJSONObject.prototype
 }