Revert of [DevTools] Consolidate overlay-related functionality in Overlay domain

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

 // Copyright 2016 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.AXTreePane = class extends Accessibility.AccessibilitySubPane {
   /**
    * @param {!Accessibility.AccessibilitySidebarView} axSidebarView
    */
@@ skipping 139 matching lines @@
   setHoveredElement(treeElement) {
     if (treeElement === this._hoveredElement)
       return;
     if (this._hoveredElement)
       this._hoveredElement.setHovered(false);
     this._hoveredElement = treeElement;
     if (!this._hoveredElement) {
       if (!this.node())
         return;
       // Highlight and scroll into view the currently inspected node.
-      this.node().domModel().overlayModel().nodeHighlightRequested(this.node().id);
+      this.node().domModel().nodeHighlightRequested(this.node().id);
     }
   }
 
   /**
    * @param {!Accessibility.AccessibilityNode} axNode
    */
   setInspectedNode(axNode) {
     var axSidebarView = this._axSidebarView;
     if (axNode.parentNode()) {
       var inspectedDOMNode = UI.context.flavor(SDK.DOMNode);
@@ skipping 335 matching lines @@
 
     return super.select(omitFocus, selectedByUser);
   }
 };
 
 /** @type {!Object<string, string>} */
 Accessibility.AXNodeTreeElement.RoleStyles = {
   internalRole: 'ax-internal-role',
   role: 'ax-role',
 };