Run dart2js tests unmodified in drt.

dart/pkg/unittest/test_controller.js

Index: dart/pkg/unittest/test_controller.js
diff --git a/dart/pkg/unittest/test_controller.js b/dart/pkg/unittest/test_controller.js
index ce7a8f0d469ee10bf7536939d94ac0f251a8dd78..5b2152103bf5aff2ecc26f92523f547632898e50 100644
--- a/dart/pkg/unittest/test_controller.js
+++ b/dart/pkg/unittest/test_controller.js
@@ -13,13 +13,26 @@ if (navigator.webkitStartDart) {
 
 var testRunner = window.testRunner || window.layoutTestController;
 
+var waitForDone = false;
+
 function processMessage(msg) {
-  if (testRunner) {
-    if (msg == 'unittest-suite-done') {
-      testRunner.notifyDone();
-    } else if (msg == 'unittest-suite-wait-for-done') {
-      testRunner.startedDartTest = true;
+  if (typeof msg != 'string') return;
+  if (msg == 'unittest-suite-done') {
+    if (testRunner) testRunner.notifyDone();
+  } else if (msg == 'unittest-suite-wait-for-done') {
+    waitForDone = true;
+    if (testRunner) testRunner.startedDartTest = true;
+  } else if (msg == 'dart-calling-main') {
+    if (testRunner) testRunner.startedDartTest = true;
+  } else if (msg == 'dart-main-done') {
+    if (!waitForDone) {
+      window.postMessage('unittest-suite-success', '*');
     }
+  } else if (msg == 'unittest-suite-success') {
+    document.body.innerHTML += '<pre>PASS</pre>';
+    if (testRunner) testRunner.notifyDone();
+  } else if (msg == 'unittest-suite-fail') {
+    showErrorAndExit('Some tests failed.');
   }
 }
 
@@ -59,7 +72,7 @@ window.addEventListener("error", function(e) {
   showErrorAndExit(e && e.message);
 }, false);
 
-document.onreadystatechange = function() {
+document.addEventListener('readystatechange', function () {
   if (document.readyState != "loaded") return;
   // If 'startedDartTest' is not set, that means that the test did not have
   // a chance to load. This will happen when a load error occurs in the VM.
@@ -74,4 +87,28 @@ document.onreadystatechange = function() {
       }
     }, 0);
   }, 50);
-};
+});
+
+// dart2js will generate code to call this function to handle the Dart
+// [print] method. The base [Configuration] (config.html) calls
+// [print] with the secret messages "unittest-suite-success" and
+// "unittest-suite-wait-for-done". These messages are then posted so
+// processMessage above will see them.
+function dartPrint(msg) {
+  if ((msg === 'unittest-suite-success')
+      || (msg === 'unittest-suite-wait-for-done')) {
+    window.postMessage(msg, '*');
+    return;
+  }
+  var pre = document.createElement("pre");
+  pre.appendChild(document.createTextNode(String(msg)));
+  document.body.appendChild(pre);
+}
+
+// dart2js will generate code to call this function instead of calling
+// Dart [main] directly. The argument is a closure that invokes main.
+function dartMainRunner(main) {
+  window.postMessage('dart-calling-main', '*');
+  main();
+  window.postMessage('dart-main-done', '*');
+}