[Sync] Revamp and re-enable themes/extensions sync integration tests

chrome/chrome_tests.gypi

 # Copyright (c) 2011 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.
 
 {
   'variables' : {
     'pyautolib_sources': [
       'app/chrome_command_ids.h',
       'app/chrome_dll_resource.h',
       'common/automation_constants.h',
@@ skipping 3079 matching lines @@
         'browser/password_manager/password_form_data.cc',
         'browser/sessions/session_backend.cc',
         'browser/sync/glue/session_model_associator.cc',
         'test/out_of_proc_test_runner.cc',
         'test/live_sync/bookmark_model_verifier.cc',
         'test/live_sync/bookmark_model_verifier.h',
         'test/live_sync/live_autofill_sync_test.cc',
         'test/live_sync/live_autofill_sync_test.h',
         'test/live_sync/live_bookmarks_sync_test.cc',
         'test/live_sync/live_bookmarks_sync_test.h',
-        'test/live_sync/live_extensions_sync_test_base.cc',
-        'test/live_sync/live_extensions_sync_test_base.h',
         'test/live_sync/live_extensions_sync_test.cc',
         'test/live_sync/live_extensions_sync_test.h',
         'test/live_sync/live_passwords_sync_test.cc',
         'test/live_sync/live_passwords_sync_test.h',
         'test/live_sync/live_preferences_sync_test.h',
         'test/live_sync/live_sessions_sync_test.cc',
         'test/live_sync/live_sessions_sync_test.h',
         'test/live_sync/live_themes_sync_test.cc',
         'test/live_sync/live_themes_sync_test.h',
+        'test/live_sync/live_sync_extension_helper.cc',
+        'test/live_sync/live_sync_extension_helper.h',
         'test/live_sync/live_sync_test.cc',
         'test/live_sync/live_sync_test.h',
         'test/live_sync/many_client_live_bookmarks_sync_test.cc',
         'test/live_sync/many_client_live_passwords_sync_test.cc',
         'test/live_sync/many_client_live_preferences_sync_test.cc',
         'test/live_sync/multiple_client_live_bookmarks_sync_test.cc',
         'test/live_sync/multiple_client_live_passwords_sync_test.cc',
         'test/live_sync/multiple_client_live_preferences_sync_test.cc',
         'test/live_sync/multiple_client_live_sessions_sync_test.cc',
         'test/live_sync/single_client_live_bookmarks_sync_test.cc',
@@ skipping 752 matching lines @@
       ]
     }],  # 'coverage!=0'
   ],  # 'conditions'
 }
 
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