Add SyncScheduler for scheduling CryptAuth enrollments and syncing devices.

components/proximity_auth.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/proximity_auth and
       # //components/proximity_auth/ble.
       'target_name': 'proximity_auth',
@@ skipping 105 matching lines @@
         "proximity_auth/cryptauth/cryptauth_client.h",
         "proximity_auth/cryptauth/cryptauth_client_impl.cc",
         "proximity_auth/cryptauth/cryptauth_client_impl.h",
         "proximity_auth/cryptauth/cryptauth_enroller.h",
         "proximity_auth/cryptauth/cryptauth_enroller_impl.cc",
         "proximity_auth/cryptauth/cryptauth_enroller_impl.h",
         "proximity_auth/cryptauth/cryptauth_enrollment_utils.cc",
         "proximity_auth/cryptauth/cryptauth_enrollment_utils.h",
         "proximity_auth/cryptauth/secure_message_delegate.cc",
         "proximity_auth/cryptauth/secure_message_delegate.h",
+        "proximity_auth/cryptauth/sync_scheduler.cc",
+        "proximity_auth/cryptauth/sync_scheduler.h",
+        "proximity_auth/cryptauth/sync_scheduler_impl.cc",
+        "proximity_auth/cryptauth/sync_scheduler_impl.h",
       ],
       'export_dependent_settings': [
         'cryptauth_proto',
       ],
     },
     {
       'target_name': 'cryptauth_test_support',
       'type': 'static_library',
       'include_dirs': [
         '..',
@@ skipping 31 matching lines @@
         'proximity_auth/webui/proximity_auth_ui.cc',
         'proximity_auth/webui/proximity_auth_ui.h',
         'proximity_auth/webui/proximity_auth_webui_handler.cc',
         'proximity_auth/webui/proximity_auth_webui_handler.h',
         'proximity_auth/webui/url_constants.cc',
         'proximity_auth/webui/url_constants.h',
       ],
     },
   ],
 }