Refactor AO2TS to make it easier to componentize.

components/components_tests.gyp

Index: components/components_tests.gyp
diff --git a/components/components_tests.gyp b/components/components_tests.gyp
index e46bb187246659ef93d37d2ba23464f5685b3bb4..19b9c36fade7b897ee329eea42e8a5f675e6c415 100644
--- a/components/components_tests.gyp
+++ b/components/components_tests.gyp
@@ -522,11 +522,10 @@
     'signin_unittest_sources': [
       'signin/core/browser/account_tracker_service_unittest.cc',
       'signin/core/browser/gaia_cookie_manager_service_unittest.cc',
-      'signin/core/browser/mutable_profile_oauth2_token_service_unittest.cc',
       'signin/core/browser/refresh_token_annotation_request_unittest.cc',
       'signin/core/browser/signin_error_controller_unittest.cc',
       'signin/core/browser/webdata/token_service_table_unittest.cc',
-      'signin/ios/browser/profile_oauth2_token_service_ios_unittest.mm',
+      'signin/ios/browser/profile_oauth2_token_service_ios_delegate_unittest.mm',
     ],
     'storage_monitor_unittest_sources': [
       'storage_monitor/image_capture_device_manager_unittest.mm',
@@ -959,7 +958,6 @@
           ],
           'sources!': [
             'metrics/gpu/gpu_metrics_provider_unittest.cc',
-            'signin/core/browser/mutable_profile_oauth2_token_service_unittest.cc',
           ],
           'sources/': [
             # Exclude all tests that depends on //content (based on layered-
@@ -1038,7 +1036,6 @@
             'gcm_driver/gcm_stats_recorder_impl_unittest.cc',
             'gcm_driver/instance_id/instance_id_driver_unittest.cc',
             'sessions/session_backend_unittest.cc',
-            'signin/core/browser/mutable_profile_oauth2_token_service_unittest.cc',
             'storage_monitor/media_storage_util_unittest.cc',
             'storage_monitor/storage_info_unittest.cc',
             'storage_monitor/storage_monitor_unittest.cc',