DevTools: [wip] move Elements panel off WebInspector.domModel and single tree outline.

Source/devtools/front_end/DOMModel.js

Index: Source/devtools/front_end/DOMModel.js
diff --git a/Source/devtools/front_end/DOMModel.js b/Source/devtools/front_end/DOMModel.js
index e934b9d43f8eb9827ba2a13a3bcba52d7801c378..1002ca4ddb68cd47e34c1b88724825d8bf02cb02 100644
--- a/Source/devtools/front_end/DOMModel.js
+++ b/Source/devtools/front_end/DOMModel.js
@@ -136,6 +136,14 @@ WebInspector.DOMNode.ShadowRootTypes = {
 
 WebInspector.DOMNode.prototype = {
     /**
+     * @return {!WebInspector.DOMModel}
+     */
+    domModel: function()
+    {
+        return this._domModel;
+    },
+
+    /**
      * @return {?Array.<!WebInspector.DOMNode>}
      */
     children: function()
@@ -784,6 +792,25 @@ WebInspector.DOMNode.prototype = {
         return null;
     },
 
+    /**
+     * @param {string=} mode
+     * @param {!RuntimeAgent.RemoteObjectId=} objectId
+     */
+    highlight: function(mode, objectId)
+    {
+        this._domModel.highlightDOMNode(this.id, mode, objectId);
+    },
+
+    highlightForTwoSeconds: function()
+    {
+        this._domModel.highlightDOMNodeForTwoSeconds(this.id);
+    },
+
+    reveal: function()
+    {
+        WebInspector.Revealer.reveal(this);
+    },
+
     __proto__: WebInspector.TargetAware.prototype
 }