This CL fixes the issue with login using alternative e-mails.

tools/telemetry/telemetry/internal/backends/chrome/cros_browser_backend.py

 # Copyright 2013 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import logging
 import os
 
 from telemetry.core import exceptions
 from telemetry.core import util
 from telemetry import decorators
@@ skipping 121 matching lines @@
       try:
         if self._is_guest:
           pid = self.pid
           self.oobe.NavigateGuestLogin()
           # Guest browsing shuts down the current browser and launches an
           # incognito browser in a separate process, which we need to wait for.
           util.WaitFor(lambda: pid != self.pid, 10)
         elif self.browser_options.gaia_login:
           self.oobe.NavigateGaiaLogin(self._username, self._password)
         else:
-          self.oobe.NavigateFakeLogin(self._username, self._password)
+          self.oobe.NavigateFakeLogin(self._username, self._password,
+              self._gaia_id)
+
         self._WaitForLogin()
       except exceptions.TimeoutException:
         raise exceptions.LoginException('Timed out going through login screen')
 
     logging.info('Browser is up!')
 
   def Close(self):
     super(CrOSBrowserBackend, self).Close()
 
     if self._cri:
@@ skipping 36 matching lines @@
     return self.misc_web_contents_backend.oobe_exists
 
   @property
   def _username(self):
     return self.browser_options.username
 
   @property
   def _password(self):
     return self.browser_options.password
 
+  @property
+  def _gaia_id(self):
+    return self.browser_options.gaia_id
+
   def _IsCryptohomeMounted(self):
     username = '$guest' if self._is_guest else self._username
     return self._cri.IsCryptohomeMounted(username, self._is_guest)
 
   def _IsLoggedIn(self):
     """Returns True if cryptohome has mounted, the browser is
     responsive to devtools requests, and the oobe has been dismissed."""
     return (self._IsCryptohomeMounted() and
             self.HasBrowserFinishedLaunching() and
             not self.oobe_exists)
 
   def _WaitForLogin(self):
     # Wait for cryptohome to mount.
     util.WaitFor(self._IsLoggedIn, 60)
 
     # For incognito mode, the session manager actually relaunches chrome with
     # new arguments, so we have to wait for the browser to come up.
     self._WaitForBrowserToComeUp()
 
     # Wait for extensions to load.
     if self._supports_extensions:
       self._WaitForExtensionsToLoad()