DevTools: traverse widget hierarchy to reveal views.

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 b525281bd5b032f4a800385af50e97e07704487a..25c78783bdc2e03f2ccc93c167822f16333698d1 100644
--- a/third_party/WebKit/Source/devtools/front_end/accessibility/AccessibilitySidebarView.js
+++ b/third_party/WebKit/Source/devtools/front_end/accessibility/AccessibilitySidebarView.js
@@ -11,7 +11,10 @@ WebInspector.AccessibilitySidebarView = function()
     WebInspector.ThrottledView.call(this, WebInspector.UIString("Accessibility"));
     this._axNodeSubPane = null;
     this._node = null;
-    this._sidebarPaneStack = null;
+    this._sidebarPaneStack = new WebInspector.View.ExpandableStackContainer();
+    this._axNodeSubPane = new WebInspector.AXNodeSubPane();
+    this._sidebarPaneStack.appendView(this._axNodeSubPane, true);
+    this._sidebarPaneStack.show(this.element);
     WebInspector.context.addFlavorChangeListener(WebInspector.DOMNode, this._pullNode, this);
     this._pullNode();
 }
@@ -53,16 +56,7 @@ WebInspector.AccessibilitySidebarView.prototype = {
     {
         WebInspector.ThrottledView.prototype.wasShown.call(this);
 
-        if (!this._sidebarPaneStack) {
-            this._axNodeSubPane = new WebInspector.AXNodeSubPane();
-            this._axNodeSubPane.setNode(this.node());
-            this._axNodeSubPane.show(this.element);
-
-            this._sidebarPaneStack = new WebInspector.SidebarPaneStack();
-            this._sidebarPaneStack.element.classList.add("flex-auto");
-            this._sidebarPaneStack.show(this.element);
-            this._sidebarPaneStack.addPane(this._axNodeSubPane);
-        }
+        this._axNodeSubPane.setNode(this.node());
 
         WebInspector.targetManager.addModelListener(WebInspector.DOMModel, WebInspector.DOMModel.Events.AttrModified, this._onAttrChange, this);
         WebInspector.targetManager.addModelListener(WebInspector.DOMModel, WebInspector.DOMModel.Events.AttrRemoved, this._onAttrChange, this);
@@ -84,8 +78,7 @@ WebInspector.AccessibilitySidebarView.prototype = {
     _pullNode: function()
     {
         this._node = WebInspector.context.flavor(WebInspector.DOMNode);
-        if (this._axNodeSubPane)
-            this._axNodeSubPane.setNode(this._node);
+        this._axNodeSubPane.setNode(this._node);
         this.update();
     },
 
@@ -164,7 +157,7 @@ WebInspector.AccessibilitySubPane.prototype = {
      */
     createInfo: function(textContent, className)
     {
-        var classNameOrDefault = className || "info";
+        var classNameOrDefault = className || "gray-info-message";
         var info = this.element.createChild("div", classNameOrDefault);
         info.textContent = textContent;
         return info;