DevTools: preserve computed properties expansion on Computed Style re-rendering

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]
 }
 
-InspectorTest.dumpComputedStyle = function()
+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")
             continue;
         var dumpText = "";
         dumpText += treeElement.title.querySelector(".property-name").textContent;
         dumpText += " ";
         dumpText += treeElement.title.querySelector(".property-value").textContent;
         InspectorTest.addResult(dumpText);
+        if (doNotAutoExpand && !treeElement.expanded)
+            continue;
         for (var trace of treeElement.children()) {
             var title = trace.title;
             var dumpText = "";
             if (trace.title.classList.contains("property-trace-inactive"))
                 dumpText += "OVERLOADED ";
             dumpText += title.querySelector(".property-trace-value").textContent;
             dumpText += " - ";
             dumpText += title.querySelector(".property-trace-selector").textContent;
             var link = title.querySelector(".trace-link");
             if (link)
                 dumpText += " " + extractText(link);
             InspectorTest.addResult("    " + dumpText);
         }
     }
 }
 
 InspectorTest.findComputedPropertyWithName = function(name)
 {
     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 === name)
-            return treeElement.title;
+            return treeElement;
     }
     return null;
 }
 
 InspectorTest.firstMatchedStyleSection = function()
 {
     return WebInspector.panels.elements.sidebarPanes.styles._sectionBlocks[0].sections[1];
 }
 
 InspectorTest.firstMediaTextElementInSection = function(section)
@@ skipping 907 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);
     }
 }
 
 };