DevTools: introduce View: a named widget with the toolbar.

third_party/WebKit/LayoutTests/http/tests/inspector/elements-test.js

 var initialize_ElementTest = function() {
 
 InspectorTest.preloadPanel("elements");
 
 InspectorTest.inlineStyleSection = function()
 {
     return WebInspector.panels.elements.sidebarPanes.styles._sectionBlocks[0].sections[0];
 }
 
 InspectorTest.computedStyleWidget = function()
 {
-    return WebInspector.panels.elements.sidebarPanes.computedStyle.children()[0]
+    return WebInspector.panels.elements.sidebarPanes.computedStyle;
 }
 
 InspectorTest.dumpComputedStyle = function(doNotAutoExpand)
 {
     var computed = InspectorTest.computedStyleWidget();
     var treeOutline = computed._propertiesOutline;
     var children = treeOutline.rootElement().children();
     for (var treeElement of children) {
         var property = treeElement[WebInspector.ComputedStyleWidget._propertySymbol];
         if (property.name === "width" || property.name === "height")
@@ skipping 407 matching lines @@
 
 InspectorTest.toggleMatchedStyleProperty = function(propertyName, checked)
 {
     var treeItem = InspectorTest.getMatchedStylePropertyTreeItem(propertyName);
     treeItem._toggleEnabled({ target: { checked: checked }, consume: function() { } });
 }
 
 InspectorTest.eventListenersWidget = function()
 {
     var sidebarPane = WebInspector.panels.elements.sidebarPanes.eventListeners;
-    sidebarPane.expandPane();
-    return sidebarPane.children()[0];
+    sidebarPane.requestReveal();
+    return sidebarPane;
 }
 
 InspectorTest.expandAndDumpSelectedElementEventListeners = function(callback)
 {
     InspectorTest.expandAndDumpEventListeners(InspectorTest.eventListenersWidget()._eventListenersView, null, callback);
 }
 
 InspectorTest.dumpObjectPropertySectionDeep = function(section)
 {
     function domNodeToString(node) {
@@ skipping 521 matching lines @@
 InspectorTest.dumpAnimationTimeline = function(timeline)
 {
     for (var ui of timeline._uiAnimations) {
         InspectorTest.addResult(ui.animation().type());
         InspectorTest.addResult(ui._nameElement.innerHTML);
         InspectorTest.addResult(ui._svg.innerHTML);
     }
 }
 
 };