DevTools: [Console] render console stacktraces consistently

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

 var initialize_InspectorTest = function() {
 
 var results = [];
 
 function consoleOutputHook(messageType)
 {
     InspectorTest.addResult(messageType + ": " + Array.prototype.slice.call(arguments, 1));
 }
 
 console.log = consoleOutputHook.bind(InspectorTest, "log");
@@ skipping 431 matching lines @@
             currentNode = currentNode.parentNode;
         }
         return Array(result * 4 + 1).join(" ");
     }
 
     var buffer = "";
     var currentNode = node;
     while (currentNode = currentNode.traverseNextNode(node)) {
         if (currentNode.nodeType === Node.TEXT_NODE) {
             buffer += currentNode.nodeValue;
-        } else if (currentNode.nodeName === "LI") {
+        } else if (currentNode.nodeName === "LI" || currentNode.nodeName === "TR") {
             buffer += "\n" + padding(currentNode);
         } else if (currentNode.nodeName === "STYLE") {
             currentNode = currentNode.traverseNextNode(node);
             continue;
         } else if (currentNode.classList.contains("console-message")) {
             buffer += "\n\n";
         }
     }
     return buffer;
 }
@@ skipping 458 matching lines @@
     _output("[page] " + text);
 }
 
 function _output(result)
 {
     if (!outputElement)
         createOutputElement();
     outputElement.appendChild(document.createTextNode(result));
     outputElement.appendChild(document.createElement("br"));
 }