Remove uses of Selenium and webdriver from test scripts.

pkg/unittest/lib/test_controller.js

 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 /**
  * Test controller logic - used by unit test harness to embed tests in
  * conent shell.
  */
 
 // Clear the console before every test run - this is Firebug specific code.
@@ skipping 29 matching lines @@
 // <script> tags, which must be run before scripts on the main page.
 // We have package:html_import to polyfill this feature, and it will handle
 // starting Dartium/content_shell in that case. HTML Imports is used by Polymer,
 // but it could be used by itself too. See the specification:
 // https://dvcs.w3.org/hg/webcomponents/raw-file/tip/spec/imports/index.html
 if (navigator.webkitStartDart && !window.HTMLImports) {
   navigator.webkitStartDart();
 }
 
 // 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;
 
 // Returns the driving window object if available
 function getDriverWindow() {
   if (window != window.parent) {
     // We're running in an iframe.
     return window.parent;
   } else if (window.opener) {
@@ skipping 67 matching lines @@
 if (testRunner) {
   testRunner.dumpAsText();
   testRunner.waitUntilDone();
 }
 window.addEventListener("message", onReceive, false);
 
 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();
 }
 
 function onLoad(e) {
   // needed for dartium compilation errors.
   if (window.compilationError) {
     showErrorAndExit(window.compilationError);
   }
 }
@@ skipping 74 matching lines @@
   try {
     main();
   } catch (e) {
     dartPrint(e);
     if (e.stack) dartPrint(e.stack);
     window.postMessage('unittest-suite-fail', '*');
     return;
   }
   dartPrint('dart-main-done');
 }