Revert of Show ancestor hierarchy in accessibility panel

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

Index: third_party/WebKit/Source/devtools/front_end/accessibility/AccessibilitySidebarView.js
diff --git a/third_party/WebKit/Source/devtools/front_end/accessibility/AccessibilitySidebarView.js b/third_party/WebKit/Source/devtools/front_end/accessibility/AccessibilitySidebarView.js
index bacd9672ab4b8dbe0d162bb3993945c3f5252053..cd80be00fa12244b1725e54004a570e47b786ed1 100644
--- a/third_party/WebKit/Source/devtools/front_end/accessibility/AccessibilitySidebarView.js
+++ b/third_party/WebKit/Source/devtools/front_end/accessibility/AccessibilitySidebarView.js
@@ -11,8 +11,6 @@
     WebInspector.ThrottledWidget.call(this);
     this._node = null;
     this._sidebarPaneStack = WebInspector.viewManager.createStackLocation();
-    this._treeSubPane = new WebInspector.AXTreePane();
-    this._sidebarPaneStack.showView(this._treeSubPane);
     this._ariaSubPane = new WebInspector.ARIAAttributesPane();
     this._sidebarPaneStack.showView(this._ariaSubPane);
     this._axNodeSubPane = new WebInspector.AXNodeSubPane();
@@ -32,39 +30,25 @@
     },
 
     /**
-     * @param {?Array<!AccessibilityAgent.AXNode>} nodes
-     */
-    accessibilityNodeCallback: function(nodes)
-    {
-        if (!nodes)
-            return;
-
-        var currentAXNode = nodes[0];
-        // TODO(aboxhall): implement hideView() in WebInspector.ViewLocation and use it here.
-        if (currentAXNode.ignored)
-            this._ariaSubPane.parentWidget().contentElement.classList.add("sidebar-hidden-override");
-        else
-            this._ariaSubPane.parentWidget().contentElement.classList.remove("sidebar-hidden-override");
-
-        if (this._axNodeSubPane)
-            this._axNodeSubPane.setAXNode(currentAXNode);
-        if (this._treeSubPane)
-            this._treeSubPane.setAXNodeAndAncestors(nodes);
-    },
-
-    /**
      * @override
      * @protected
      * @return {!Promise.<?>}
      */
     doUpdate: function()
     {
+        /**
+         * @param {?AccessibilityAgent.AXNode} accessibilityNode
+         * @this {WebInspector.AccessibilitySidebarView}
+         */
+        function accessibilityNodeCallback(accessibilityNode)
+        {
+            if (this._axNodeSubPane)
+                this._axNodeSubPane.setAXNode(accessibilityNode);
+        }
         var node = this.node();
-        this._treeSubPane.setNode(node);
-        this._axNodeSubPane.setNode(node);
         this._ariaSubPane.setNode(node);
-        return WebInspector.AccessibilityModel.fromTarget(node.target()).getAXNodeChain(node.id)
-            .then((nodes) => { this.accessibilityNodeCallback(nodes); });
+        return WebInspector.AccessibilityModel.fromTarget(node.target()).getAXNode(node.id)
+            .then(accessibilityNodeCallback.bind(this));
     },
 
     /**
@@ -74,7 +58,6 @@
     {
         WebInspector.ThrottledWidget.prototype.wasShown.call(this);
 
-        this._treeSubPane.setNode(this.node());
         this._axNodeSubPane.setNode(this.node());
         this._ariaSubPane.setNode(this.node());