Remove uses of Selenium and webdriver from test scripts.

BUG=
R=kustermann@google.com

Review URL: https://codereview.chromium.org//68213016

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart/pkg/unittest@30269 260f80e4-7a28-3924-810f-c04153c831b5

lib/test_controller.js

@@ -47,7 +47,7 @@ if (navigator.webkitStartDart && !window.HTMLImports) {
 }
 
 // testRunner is provided by content shell.
-// It is not available in selenium tests.
+// It is not available in browser tests.
 var testRunner = window.testRunner || window.layoutTestController;
 
 var waitForDone = false;
@@ -135,8 +135,8 @@ function showErrorAndExit(message) {
   if (message) {
     printMessage('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.
+  // dart/tools/testing/test_runner.dart is looking for either PASS or
+  // FAIL in a browser test's output.
   printMessage('FAIL');
   notifyDone();
 }