user_manager: Remove deps on session_manager

components/user_manager/fake_user_manager.cc

 // 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.
 
 #include "components/user_manager/fake_user_manager.h"
 
 #include "base/callback.h"
 #include "base/command_line.h"
 #include "base/sys_info.h"
 #include "base/task_runner.h"
@@ skipping 230 matching lines @@
   const user_manager::User* active_user = GetActiveUser();
   return active_user
              ? active_user->GetType() == user_manager::USER_TYPE_KIOSK_APP
              : false;
 }
 
 bool FakeUserManager::IsLoggedInAsStub() const {
   return false;
 }
 
-bool FakeUserManager::IsSessionStarted() const {
-  return false;
-}
-
 bool FakeUserManager::IsUserNonCryptohomeDataEphemeral(
     const AccountId& account_id) const {
   return false;
 }
 
 bool FakeUserManager::AreSupervisedUsersAllowed() const {
   return true;
 }
 
 bool FakeUserManager::AreEphemeralUsersEnabled() const {
@@ skipping 88 matching lines @@
   NOTIMPLEMENTED();
   return;
 }
 
 bool FakeUserManager::IsValidDefaultUserImageId(int image_index) const {
   NOTIMPLEMENTED();
   return false;
 }
 
 }  // namespace user_manager