[DevTools] Do not expose agents on Target

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

 /*
  * Copyright (C) 2009, 2010 Google Inc. All rights reserved.
  * Copyright (C) 2009 Joseph Pecoraro
  *
  * 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.
@@ skipping 1036 matching lines @@
     this.baseURL = payload.baseURL || '';
   }
 };
 
 /**
  * @unrestricted
  */
 SDK.DOMModel = class extends SDK.SDKModel {
   /**
    * @param {!SDK.Target} target
+   * @param {!Protocol.Dispatcher} dispatcher
    */
-  constructor(target) {
-    super(target);
+  constructor(target, dispatcher) {
+    super(target, dispatcher);
 
-    this._agent = target.domAgent();
+    this._agent = dispatcher.domAgent();
 
     /** @type {!Object.<number, !SDK.DOMNode>} */
     this._idToDOMNode = {};
     /** @type {?SDK.DOMDocument} */
     this._document = null;
     /** @type {!Object.<number, boolean>} */
     this._attributeLoadNodeIds = {};
-    target.registerDOMDispatcher(new SDK.DOMDispatcher(this));
+    dispatcher.registerDOMDispatcher(new SDK.DOMDispatcher(this));
 
     this._runtimeModel = /** @type {!SDK.RuntimeModel} */ (target.model(SDK.RuntimeModel));
 
     this._agent.enable();
   }
 
   /**
    * @return {!SDK.RuntimeModel}
    */
   runtimeModel() {
@@ skipping 831 matching lines @@
 
   /**
    * @override
    * @param {!Protocol.DOM.NodeId} insertionPointId
    * @param {!Array.<!Protocol.DOM.BackendNode>} distributedNodes
    */
   distributedNodesUpdated(insertionPointId, distributedNodes) {
     this._domModel._distributedNodesUpdated(insertionPointId, distributedNodes);
   }
 };