[DevTools] Do not inherit SDK.DOMNode from SDK.SDKObject

third_party/WebKit/Source/devtools/front_end/elements/ComputedStyleModel.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
  */
 Elements.ComputedStyleModel = class extends Common.Object {
   constructor() {
     super();
     this._node = UI.context.flavor(SDK.DOMNode);
@@ skipping 14 matching lines @@
    */
   cssModel() {
     return this._cssModel && this._cssModel.isEnabled() ? this._cssModel : null;
   }
 
   /**
    * @param {!Common.Event} event
    */
   _onNodeChanged(event) {
     this._node = /** @type {?SDK.DOMNode} */ (event.data);
-    this._updateModel(this._node ? SDK.CSSModel.fromNode(this._node) : null);
+    this._updateModel(this._node ? this._node.domModel().cssModel() : null);
     this._onComputedStyleChanged(null);
   }
 
   /**
    * @param {?SDK.CSSModel} cssModel
    */
   _updateModel(cssModel) {
     if (this._cssModel === cssModel)
       return;
     Common.EventTarget.removeEventListeners(this._eventListeners);
     this._cssModel = cssModel;
-    var domModel = cssModel ? cssModel.target().model(SDK.DOMModel) : null;
+    var domModel = cssModel ? cssModel.domModel() : null;
     var resourceTreeModel = cssModel ? cssModel.target().model(SDK.ResourceTreeModel) : null;
     if (cssModel && domModel && resourceTreeModel) {
       this._eventListeners = [
         cssModel.addEventListener(SDK.CSSModel.Events.StyleSheetAdded, this._onComputedStyleChanged, this),
         cssModel.addEventListener(SDK.CSSModel.Events.StyleSheetRemoved, this._onComputedStyleChanged, this),
         cssModel.addEventListener(SDK.CSSModel.Events.StyleSheetChanged, this._onComputedStyleChanged, this),
         cssModel.addEventListener(SDK.CSSModel.Events.FontsUpdated, this._onComputedStyleChanged, this),
         cssModel.addEventListener(SDK.CSSModel.Events.MediaQueryResultChanged, this._onComputedStyleChanged, this),
         cssModel.addEventListener(SDK.CSSModel.Events.PseudoStateForced, this._onComputedStyleChanged, this),
         cssModel.addEventListener(SDK.CSSModel.Events.ModelWasEnabled, this._onComputedStyleChanged, this),
@@ skipping 88 matching lines @@
 Elements.ComputedStyleModel.ComputedStyle = class {
   /**
    * @param {!SDK.DOMNode} node
    * @param {!Map.<string, string>} computedStyle
    */
   constructor(node, computedStyle) {
     this.node = node;
     this.computedStyle = computedStyle;
   }
 };