Create a FakeTetherService, which stubs out TetherService for development.

chrome/browser/chromeos/login/session/chrome_session_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 "chrome/browser/chromeos/login/session/chrome_session_manager.h"
 
 #include <memory>
 
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/memory/ptr_util.h"
 #include "base/sys_info.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/browser_process_platform_part_chromeos.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/chromeos/app_mode/arc/arc_kiosk_app_manager.h"
 #include "chrome/browser/chromeos/app_mode/kiosk_app_launch_error.h"
 #include "chrome/browser/chromeos/app_mode/kiosk_app_manager.h"
 #include "chrome/browser/chromeos/arc/arc_service_launcher.h"
 #include "chrome/browser/chromeos/boot_times_recorder.h"
 #include "chrome/browser/chromeos/login/lock/webui_screen_locker.h"
 #include "chrome/browser/chromeos/login/login_wizard.h"
 #include "chrome/browser/chromeos/login/session/user_session_manager.h"
 #include "chrome/browser/chromeos/login/wizard_controller.h"
 #include "chrome/browser/chromeos/policy/browser_policy_connector_chromeos.h"
+#include "chrome/browser/chromeos/tether/tether_service.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/signin/signin_manager_factory.h"
 #include "chrome/browser/ui/ash/ash_util.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/pref_names.h"
 #include "chromeos/audio/cras_audio_handler.h"
 #include "chromeos/chromeos_switches.h"
 #include "chromeos/cryptohome/cryptohome_parameters.h"
 #include "chromeos/dbus/dbus_thread_manager.h"
 #include "chromeos/dbus/session_manager_client.h"
@@ skipping 66 matching lines @@
       LOG(ERROR) << "Could not get active user after crash.";
       return;
     }
     user_session_mgr->InitRlz(user_profile);
     user_session_mgr->InitializeCerts(user_profile);
     user_session_mgr->InitializeCRLSetFetcher(user);
     user_session_mgr->InitializeCertificateTransparencyComponents(user);
 
     arc::ArcServiceLauncher::Get()->OnPrimaryUserProfilePrepared(user_profile);
 
+    TetherService::Get(user_profile)->StartTetherIfEnabled();
+
     // Send the PROFILE_PREPARED notification and call SessionStarted()
     // so that the Launcher and other Profile dependent classes are created.
     content::NotificationService::current()->Notify(
         chrome::NOTIFICATION_LOGIN_USER_PROFILE_PREPARED,
         content::NotificationService::AllSources(),
         content::Details<Profile>(user_profile));
 
     // This call will set session state to SESSION_STATE_ACTIVE (same one).
     session_manager::SessionManager::Get()->SessionStarted();
 
@@ skipping 104 matching lines @@
                                               const std::string& user_id_hash,
                                               bool browser_restart) {
   BootTimesRecorder* btl = BootTimesRecorder::Get();
   btl->AddLoginTimeMarker("UserLoggedIn-Start", false);
   session_manager::SessionManager::NotifyUserLoggedIn(
       user_account_id, user_id_hash, browser_restart);
   btl->AddLoginTimeMarker("UserLoggedIn-End", false);
 }
 
 }  // namespace chromeos