Revert of Create a new AccountTrackerService

components/signin.gypi

 # 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.
 
 {
   'targets': [
     {
       # GN version: //components/signin/core/common
       'target_name': 'signin_core_common',
       'type': 'static_library',
@@ skipping 30 matching lines @@
         '..',
       ],
       'sources': [
         # Note: file list duplicated in GN build.
         'signin/core/browser/about_signin_internals.cc',
         'signin/core/browser/about_signin_internals.h',
         'signin/core/browser/account_reconcilor.cc',
         'signin/core/browser/account_reconcilor.h',
         'signin/core/browser/account_service_flag_fetcher.cc',
         'signin/core/browser/account_service_flag_fetcher.h',
-        'signin/core/browser/account_tracker_service.cc',
-        'signin/core/browser/account_tracker_service.h',
         'signin/core/browser/mutable_profile_oauth2_token_service.cc',
         'signin/core/browser/mutable_profile_oauth2_token_service.h',
         'signin/core/browser/profile_oauth2_token_service.cc',
         'signin/core/browser/profile_oauth2_token_service.h',
         'signin/core/browser/signin_account_id_helper.cc',
         'signin/core/browser/signin_account_id_helper.h',
         'signin/core/browser/signin_client.h',
         'signin/core/browser/signin_error_controller.cc',
         'signin/core/browser/signin_error_controller.h',
         'signin/core/browser/signin_internals_util.cc',
@@ skipping 69 matching lines @@
           'sources': [
             # Note: file list duplicated in GN build.
             'signin/ios/browser/profile_oauth2_token_service_ios.h',
             'signin/ios/browser/profile_oauth2_token_service_ios.mm',
           ],
         },
       ],
     }],
   ],
 }