anchor.diff:  
   /**
    * Encapsulates all the functionality for running tests in browsers.
  - * The interface is rather simple. After starting the runner tests
  + * The interface is rather simple. After starting, the runner tests
    * are simply added to the queue and a the supplied callbacks are called
    * whenever a test completes.
    */
  
positive.code:       return _adbDevice.adbRoot();
      }).then((_) {
        return _adbDevice.setProp("DART_FORWARDING_PRINT", "1");
      }).then((_) {
        return _adbDevice.startActivity(intent).then((_) => true);
      });
  
negative.code:     var androidBrowserCreationMapping = {
        'chromeOnAndroid' : (AdbDevice device) => new AndroidChrome(device),
        'ContentShellOnAndroid' : (AdbDevice device) =>
            new AndroidBrowser(device, contentShellOnAndroidConfig, checkedMode),
        'DartiumOnAndroid' : (AdbDevice device) =>
            new AndroidBrowser(device, dartiumOnAndroidConfig, checkedMode),
      };
      if (androidBrowserCreationMapping.containsKey(browserName)) {
        AdbHelper.listDevices().then((deviceIds) {
  