DevTools: make disable javascript setting temporary

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

 /*
  * Copyright (C) 2011 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 671 matching lines @@
  * @unrestricted
  */
 SDK.MultitargetNetworkManager = class extends Common.Object {
   constructor() {
     super();
 
     /** @type {!Set<string>} */
     this._blockedURLs = new Set();
     this._blockedSetting = Common.moduleSetting('networkBlockedURLs');
     this._blockedSetting.addChangeListener(this._updateBlockedURLs, this);
-    this._blockedSetting.set([]);
     this._updateBlockedURLs();
 
     this._userAgentOverride = '';
     /** @type {!Set<!Protocol.NetworkAgent>} */
     this._agents = new Set();
     /** @type {!SDK.NetworkManager.Conditions} */
     this._networkConditions = SDK.NetworkManager.NoThrottlingConditions;
 
     SDK.targetManager.observeTargets(this, SDK.Target.Capability.Network);
   }
@@ skipping 211 matching lines @@
 SDK.MultitargetNetworkManager.Events = {
   ConditionsChanged: Symbol('ConditionsChanged'),
   UserAgentChanged: Symbol('UserAgentChanged')
 };
 
 
 /**
  * @type {!SDK.MultitargetNetworkManager}
  */
 SDK.multitargetNetworkManager;