Implement SyncableServices in TemplateURLService. Add related unittests.

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 1611 matching lines @@
         'browser/safe_browsing/safe_browsing_database_unittest.cc',
         'browser/safe_browsing/safe_browsing_store_file_unittest.cc',
         'browser/safe_browsing/safe_browsing_store_unittest.cc',
         'browser/safe_browsing/safe_browsing_store_unittest_helper.cc',
         'browser/safe_browsing/safe_browsing_util_unittest.cc',
         'browser/search_engines/search_host_to_urls_map_unittest.cc',
         'browser/search_engines/search_provider_install_data_unittest.cc',
         'browser/search_engines/template_url_fetcher_unittest.cc',
         'browser/search_engines/template_url_service_test_util.cc',
         'browser/search_engines/template_url_service_test_util.h',
+        'browser/search_engines/template_url_service_sync_unittest.cc',
         'browser/search_engines/template_url_service_unittest.cc',
         'browser/search_engines/template_url_parser_unittest.cc',
         '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/shell_integration_unittest.cc',
         'browser/speech/speech_input_bubble_controller_unittest.cc',
         'browser/spellchecker/spellchecker_platform_engine_unittest.cc',
@@ skipping 2495 matching lines @@
               # Use outputs of this action as inputs for the main target build.
               # Seems as a misnomer but makes this happy on Linux (scons).
               'process_outputs_as_sources': 1,
             },
           ],  # 'actions'
         },
       ]
     }],  # 'coverage!=0'
   ],  # 'conditions'
 }