Move auth-error reporting code out of SyncGlobalError and into SigninGlobalError

chrome/chrome_tests_unit.gypi

 # Copyright 2012 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': [
     {
       # This target contains mocks and test utilities that don't belong in
       # production libraries but are used by more than one test executable.
       'target_name': 'test_support_common',
       'type': 'static_library',
@@ skipping 1021 matching lines @@
         'browser/search_engines/template_url_prepopulate_data_unittest.cc',
         'browser/search_engines/template_url_scraper_unittest.cc',
         'browser/search_engines/template_url_unittest.cc',
         'browser/sessions/session_backend_unittest.cc',
         'browser/sessions/session_service_unittest.cc',
         'browser/sessions/session_types_unittest.cc',
         'browser/shell_integration_unittest.cc',
         'browser/shell_integration_win_unittest.cc',
         'browser/signin/oauth2_token_service_request_unittest.cc',
         'browser/signin/oauth2_token_service_unittest.cc',
+        'browser/signin/signin_global_error_unittest.cc',
         'browser/signin/signin_manager_fake.cc',
         'browser/signin/signin_manager_fake.h',
         'browser/signin/signin_manager_unittest.cc',
         'browser/signin/signin_names_io_thread_unittest.cc',
         'browser/signin/signin_tracker_unittest.cc',
         'browser/signin/token_service_unittest.cc',
         'browser/signin/token_service_unittest.h',
         'browser/signin/ubertoken_fetcher_unittest.cc',
         'browser/speech/extension_api/extension_manifests_tts_unittest.cc',
         'browser/speech/extension_api/tts_extension_api_controller_unittest.cc',
@@ skipping 1275 matching lines @@
             'unit_tests.isolate',
           ],
           'sources': [
             'unit_tests.isolate',
           ],
         },
       ],
     }],
   ],  # 'conditions'
 }