DevTools: Fix console.log for arrays in some corner cases.

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

 var initialize_InspectorTest = function() {
 
 var results = [];
 var resultsSynchronized = false;
 
 function consoleOutputHook(messageType)
 {
     InspectorTest.addResult(messageType + ": " + Array.prototype.slice.call(arguments, 1));
 }
 
@@ skipping 392 matching lines @@
 {
     var buffer = "";
     var currentNode = node;
     while (currentNode = currentNode.traverseNextNode(node)) {
         if (currentNode.nodeType === Node.TEXT_NODE)
             buffer += currentNode.nodeValue;
         else if (currentNode.nodeName === "LI")
             buffer += "\n    ";
         else if (currentNode.classList.contains("console-message"))
             buffer += "\n\n";
+        else if (currentNode.classList.contains("console-user-command"))
+            buffer += "\n\n> ";
     }
     return buffer;
 }
 
 InspectorTest.StringOutputStream = function(callback)
 {
     this._callback = callback;
     this._buffer = "";
 };
 
@@ skipping 291 matching lines @@
     evaluateInWebInspector: function(callId, script)
     {
         window.opener.postMessage(["evaluateInWebInspector", callId, script], "*");
     },
 
     display: function() { }
 }
 
 if (!window.testRunner && window.opener)
     window.testRunner = new StandaloneTestRunnerStub();