DevTools: [Elements] Restore selected shadow DOM elements on reload

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

 var initialize_ElementTest = function() {
 
 InspectorTest.findNode = function(matchFunction, callback)
 {
     callback = InspectorTest.safeWrap(callback);
     var result = null;
     var pendingRequests = 0;
     function processChildren(node)
     {
         try {
@@ skipping 55 matching lines @@
 {
     var result;
     function callback(node)
     {
         result = node;
     }
     InspectorTest.nodeWithId(idValue, callback);
     return result;
 }
 
+InspectorTest.selectNode = function(node)
+{
+    WebInspector.Revealer.reveal(node);
+}
+
 InspectorTest.selectNodeWithId = function(idValue, callback)
 {
     callback = InspectorTest.safeWrap(callback);
     function onNodeFound(node)
     {
-        WebInspector.Revealer.reveal(node);
+        InspectorTest.selectNode(node);
         callback(node);
     }
     InspectorTest.nodeWithId(idValue, onNodeFound);
 }
 
 function waitForStylesRebuild(matchFunction, callback, requireRebuild)
 {
     (function sniff(node, rebuild)
     {
         if ((rebuild || !requireRebuild) && node && matchFunction(node)) {
@@ skipping 626 matching lines @@
 {
     var rectNames = ["margin", "border", "padding", "content"];
     var rects = window.internals.inspectorHighlightRects(document);
     for (var i = 0; i < rects.length; i++)
     {
         var rectName = (i < rectNames.length ? rectNames[i] : "untitled");
         var rect = rects.item(i);
         output(rectName + " rect is " + rect.width + " x " + rect.height + " at (" + rect.left + ", " + rect.top + ")");
     }
 }