Enable wrapper-less browser tests on selenium.

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 5b2152103bf5aff2ecc26f92523f547632898e50..b5734b93e78d000f21799c3d611a95bd1f2e3bd8 100644
--- a/dart/pkg/unittest/test_controller.js
+++ b/dart/pkg/unittest/test_controller.js
@@ -11,6 +11,8 @@ if (navigator.webkitStartDart) {
   navigator.webkitStartDart();
 }
 
+// testRunner is provided by DRT or WebKit's layout tests.
+// It is not available in selenium tests.
 var testRunner = window.testRunner || window.layoutTestController;
 
 var waitForDone = false;
@@ -29,7 +31,7 @@ function processMessage(msg) {
       window.postMessage('unittest-suite-success', '*');
     }
   } else if (msg == 'unittest-suite-success') {
-    document.body.innerHTML += '<pre>PASS</pre>';
+    dartPrint('PASS');
     if (testRunner) testRunner.notifyDone();
   } else if (msg == 'unittest-suite-fail') {
     showErrorAndExit('Some tests failed.');
@@ -48,13 +50,12 @@ window.addEventListener("message", onReceive, false);
 
 function showErrorAndExit(message) {
   if (message) {
-    var element = document.createElement('pre');
-    element.innerHTML = message;
-    document.body.appendChild(element);
-  }
-  if (testRunner) {
-    testRunner.notifyDone();
+    dartPrint('Error: ' + String(message));
   }
+  // dart/tools/testing/run_selenium.py is looking for either PASS or
+  // FAIL and will continue polling until one of these words show up.
+  dartPrint('FAIL');
+  if (testRunner) testRunner.notifyDone();
 }
 
 function onLoad(e) {
@@ -109,6 +110,11 @@ function dartPrint(msg) {
 // Dart [main] directly. The argument is a closure that invokes main.
 function dartMainRunner(main) {
   window.postMessage('dart-calling-main', '*');
-  main();
+  try {
+    main();
+  } catch (e) {
+    window.postMessage('unittest-suite-fail', '*');
+    return;
+  }
   window.postMessage('dart-main-done', '*');
 }