Handle the "key" field as opposed to keyIdentifier field.

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

 if (window.GCController)
     GCController.collectAll();
 var initialize_InspectorTest = function() {
 
 var results = [];
 
 function consoleOutputHook(messageType)
 {
     InspectorTest.addResult(messageType + ": " + Array.prototype.slice.call(arguments, 1));
 }
@@ skipping 503 matching lines @@
 
 InspectorTest.deprecatedRunAfterPendingDispatches = function(callback)
 {
     var barrier = new CallbackBarrier();
     var targets = WebInspector.targetManager.targets();
     for (var i = 0; i < targets.length; ++i)
         targets[i]._connection.deprecatedRunAfterPendingDispatches(barrier.createCallback());
     barrier.callWhenDone(InspectorTest.safeWrap(callback));
 }
 
-InspectorTest.createKeyEvent = function(keyIdentifier, ctrlKey, altKey, shiftKey, metaKey)
+InspectorTest.createKeyEvent = function(key, ctrlKey, altKey, shiftKey, metaKey)
 {
-    var evt = document.createEvent("KeyboardEvent");
-    evt.initKeyboardEvent("keydown", true /* can bubble */, true /* can cancel */, null /* view */, keyIdentifier, "", ctrlKey, altKey, shiftKey, metaKey);
-    return evt;
+    var keyIdentifier = key;
+    if (key === "Tab")
+        keyIdentifier = "U+0009";
+    else if (key == "Escape")
+        keyIdentifier = "U+001B";
+    else if (key == "ArrowUp")
+        keyIdentifier = "Up";
+    else if (key == "ArrowDown")
+        keyIdentifier = "Down";
+    return new KeyboardEvent("keydown", {key: key, keyIdentifier: keyIdentifier, bubbles: true, cancelable: true, ctrlKey: ctrlKey, altKey: altKey, shiftKey: shiftKey, metaKey: metaKey});
 }
 
 InspectorTest.runTestSuite = function(testSuite)
 {
     var testSuiteTests = testSuite.slice();
 
     function runner()
     {
         if (!testSuiteTests.length) {
             InspectorTest.completeTest();
@@ skipping 666 matching lines @@
     _output("[page] " + text);
 }
 
 function _output(result)
 {
     if (!outputElement)
         createOutputElement();
     outputElement.appendChild(document.createTextNode(result));
     outputElement.appendChild(document.createElement("br"));
 }