[DevTools] Consolidate overlay-related functionality in Overlay domain

third_party/WebKit/Source/devtools/front_end/accessibility/AccessibilityModel.js

 // Copyright (c) 2014 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
  */
 Accessibility.AccessibilityNode = class {
   /**
    * @param {!Accessibility.AccessibilityModel} accessibilityModel
    * @param {!Protocol.Accessibility.AXNode} payload
@@ skipping 138 matching lines @@
     if (!this.deferredDOMNode())
       return;
 
     // Highlight node in page.
     this.deferredDOMNode().highlight();
 
     // Highlight node in Elements tree.
     this.deferredDOMNode().resolvePromise().then(node => {
       if (!node)
         return;
-      node.domModel().nodeHighlightRequested(node.id);
+      node.domModel().overlayModel().nodeHighlightRequested(node.id);
     });
   }
 
   /**
    * @return {!Array<!Accessibility.AccessibilityNode>}
    */
   children() {
     var children = [];
     if (!this._childIds)
       return children;
@@ skipping 140 matching lines @@
    */
   logTree(inspectedNode) {
     var rootNode = inspectedNode;
     while (rootNode.parentNode())
       rootNode = rootNode.parentNode();
     console.log(rootNode.printSelfAndChildren(inspectedNode));  // eslint-disable-line no-console
   }
 };
 
 SDK.SDKModel.register(Accessibility.AccessibilityModel, SDK.Target.Capability.DOM, false);