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

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

Index: tools/telemetry/telemetry/internal/backends/chrome/cros_browser_backend.py
diff --git a/tools/telemetry/telemetry/internal/backends/chrome/cros_browser_backend.py b/tools/telemetry/telemetry/internal/backends/chrome/cros_browser_backend.py
index 42cc73b9691d0e681dee7d3d5922819c03c23492..6df641f473a213fd4780ca5e10a4155d0ca7a248 100644
--- a/tools/telemetry/telemetry/internal/backends/chrome/cros_browser_backend.py
+++ b/tools/telemetry/telemetry/internal/backends/chrome/cros_browser_backend.py
@@ -139,7 +139,9 @@ class CrOSBrowserBackend(chrome_browser_backend.ChromeBrowserBackend):
         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')
@@ -196,6 +198,10 @@ class CrOSBrowserBackend(chrome_browser_backend.ChromeBrowserBackend):
   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)