[Telemetry] Reorganize everything.

tools/telemetry/telemetry/facebook_credentials_backend.py

-# Copyright (c) 2012 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.
-
-from telemetry import form_based_credentials_backend
-
-class FacebookCredentialsBackend(
-    form_based_credentials_backend.FormBasedCredentialsBackend):
-  def IsAlreadyLoggedIn(self, tab):
-    return tab.EvaluateJavaScript(
-        'document.getElementById("fbNotificationsList")!== null || '
-        'document.getElementById("m_home_notice")!== null')
-
-  @property
-  def credentials_type(self):
-    return 'facebook'
-
-  @property
-  def url(self):
-    return 'http://www.facebook.com/'
-
-  @property
-  def login_form_id(self):
-    return 'login_form'
-
-  @property
-  def login_input_id(self):
-    return 'email'
-
-  @property
-  def password_input_id(self):
-    return 'pass'