DevTools: do not leak memory through event listeners

third_party/WebKit/Source/devtools/front_end/common/Object.js

 /*
  * Copyright (C) 2008 Apple 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 149 matching lines @@
 
 /**
  * @param {!Array<!WebInspector.EventTarget.EventDescriptor>} eventList
  */
 WebInspector.EventTarget.removeEventListeners = function(eventList)
 {
     for (var i = 0; i < eventList.length; ++i) {
         var eventInfo = eventList[i];
         eventInfo.eventTarget.removeEventListener(eventInfo.eventType, eventInfo.method, eventInfo.receiver);
     }
+    // Do not hold references on unused event descriptors.
+    eventList.splice(0, eventList.length);
 }
 
 WebInspector.EventTarget.prototype = {
     /**
      * @param {string|symbol} eventType
      * @param {function(!WebInspector.Event)} listener
      * @param {!Object=} thisObject
      * @return {!WebInspector.EventTarget.EventDescriptor}
      */
     addEventListener: function(eventType, listener, thisObject) { },
@@ skipping 28 matching lines @@
  * @param {(!Object|undefined)} receiver
  * @param {function(?):?} method
  */
 WebInspector.EventTarget.EventDescriptor = function(eventTarget, eventType, receiver, method)
 {
     this.eventTarget = eventTarget;
     this.eventType = eventType;
     this.receiver = receiver;
     this.method = method;
 }