[DevTools] Consolidate overlay-related functionality in Overlay domain

third_party/WebKit/Source/devtools/front_end/sources/NavigatorView.js

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  * 1. Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *
@@ skipping 415 matching lines @@
     this._frameNodes.set(frame, frameNode);
     this._frameNode(project, target, frame.parentFrame).appendChild(frameNode);
     if (!frame.parentFrame)
       frameNode.treeNode()._boostOrder = true;
 
     /**
      * @param {boolean} hovered
      */
     function hoverCallback(hovered) {
       if (hovered) {
-        var domModel = target.model(SDK.DOMModel);
-        if (domModel)
-          domModel.highlightFrame(frame.id);
+        var overlayModel = target.model(SDK.OverlayModel);
+        if (overlayModel)
+          overlayModel.highlightFrame(frame.id);
       } else {
-        SDK.DOMModel.hideDOMNodeHighlight();
+        SDK.OverlayModel.hideDOMNodeHighlight();
       }
     }
     return frameNode;
   }
 
   /**
    * @param {!Workspace.Project} project
    * @param {!SDK.Target} target
    * @return {!Sources.NavigatorTreeNode}
    */
@@ skipping 1141 matching lines @@
   /**
    * @param {string} title
    * @override
    */
   setTitle(title) {
     this._title = title;
     if (this._treeElement)
       this._treeElement.title = this._title;
   }
 };