[Devtools] Added Enable/Disable for request blocking in network

third_party/WebKit/Source/devtools/front_end/network/BlockedURLsPane.js

 // Copyright (c) 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 /**
  * @unrestricted
  */
 Network.BlockedURLsPane = class extends UI.VBox {
   constructor() {
     super(true);
     this.registerRequiredCSS('network/blockedURLsPane.css');
     this.contentElement.classList.add('blocked-urls-pane');
 
     Network.BlockedURLsPane._instance = this;
 
     this._blockedURLsSetting = Common.moduleSetting('networkBlockedURLs');
     this._blockedURLsSetting.addChangeListener(this._update, this);
 
     this._toolbar = new UI.Toolbar('', this.contentElement);
     this._toolbar.element.addEventListener('click', e => e.consume());
     var addButton = new UI.ToolbarButton(Common.UIString('Add pattern'), 'largeicon-add');
     addButton.addEventListener(UI.ToolbarButton.Events.Click, this._addButtonClicked, this);
     this._toolbar.appendToolbarItem(addButton);
     var clearButton = new UI.ToolbarButton(Common.UIString('Remove all'), 'largeicon-clear');
     clearButton.addEventListener(UI.ToolbarButton.Events.Click, this._removeAll, this);
     this._toolbar.appendToolbarItem(clearButton);
 
+    var enableRequestBlockingCheckbox = new UI.ToolbarSettingCheckbox(Common.moduleSetting('requestBlockingEnabled'));
+    this._toolbar.appendToolbarItem(enableRequestBlockingCheckbox);
+
     this._emptyElement = this.contentElement.createChild('div', 'no-blocked-urls');
     this._emptyElement.createChild('span').textContent = Common.UIString('Requests are not blocked. ');
     var addLink = this._emptyElement.createChild('span', 'link');
     addLink.textContent = Common.UIString('Add pattern.');
     addLink.href = '';
     addLink.addEventListener('click', this._addButtonClicked.bind(this), false);
     this._emptyElement.addEventListener('contextmenu', this._emptyElementContextMenu.bind(this), true);
 
     this._listElement = this.contentElement.createChild('div', 'blocked-urls-list');
 
@@ skipping 222 matching lines @@
     if (request.wasBlocked()) {
       var count = this._blockedCountForUrl.get(request.url()) || 0;
       this._blockedCountForUrl.set(request.url(), count + 1);
       this._updateThrottler.schedule(this._update.bind(this));
     }
   }
 };
 
 /** @type {?Network.BlockedURLsPane} */
 Network.BlockedURLsPane._instance = null;