The password manager python tests now logout from websites by cleaning the cookies.

components/test/data/password_manager/websitetest.py

 # Copyright 2014 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.
 
 """WebsiteTest testing class."""
 
 import logging
 import sys
 import time
 
@@ skipping 276 matching lines @@
     """Logs in and checks that the password is autofilled."""
     self.mode = self.Mode.AUTOFILLED
     self.Login()
 
   def LoginWhenNotAutofilled(self):
     """Logs in and checks that the password is not autofilled."""
     self.mode = self.Mode.NOT_AUTOFILLED
     self.Login()
 
   def Logout(self):
-    """Logout Method. Has to be overloaded by the Website test."""
-    raise NotImplementedError("Logout is not implemented.")
+    """Logout Method."""
+    self.environment.ClearAllCookies()
 
   # Tests
 
   def WrongLoginTest(self):
     """Does the wrong login test: Tries to login with a wrong password and
     checks that the password is not saved.
 
     Raises:
       Exception: An exception is raised if the test fails: If there is a
           problem when performing the login (ex: the login button is not
@@ skipping 93 matching lines @@
 
     self.LoginWhenNotAutofilled()
     self.Wait(2)
     self.environment.SwitchToInternals()
     self.environment.CheckForNewMessage(
         environment.MESSAGE_ASK,
         True,
         "Error: password manager thinks that a login with wrong password was "
         "successful for the following website : %s \n" % self.name)
     self.environment.SwitchFromInternals()