[Sync] Add interface and backend impl for typed URL syncable service

chrome/chrome_browser.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': [
     {
       'target_name': 'browser',
       'type': 'static_library',
       'variables': { 'enable_wexit_time_destructors': 1, },
@@ skipping 737 matching lines @@
         'browser/history/top_sites_backend.cc',
         'browser/history/top_sites_backend.h',
         'browser/history/top_sites_cache.cc',
         'browser/history/top_sites_cache.h',
         'browser/history/top_sites_database.cc',
         'browser/history/top_sites_database.h',
         'browser/history/top_sites_impl.cc',
         'browser/history/top_sites_impl.h',
         'browser/history/top_sites_likely_impl.cc',
         'browser/history/top_sites_likely_impl.h',
+        'browser/history/typed_url_syncable_service.cc',
+        'browser/history/typed_url_syncable_service.h',
         'browser/history/url_database.cc',
         'browser/history/url_database.h',
         'browser/history/url_index_private_data.cc',
         'browser/history/url_index_private_data.h',
         'browser/history/visit_database.cc',
         'browser/history/visit_database.h',
         'browser/history/visit_filter.cc',
         'browser/history/visit_filter.h',
         'browser/history/visit_tracker.cc',
         'browser/history/visit_tracker.h',
@@ skipping 2377 matching lines @@
             'package_name': 'org/chromium/chrome/browser/ui/toolbar',
             'template_deps': ['browser/ui/toolbar/toolbar_model_security_level_list.h'],
           },
           'includes': [ '../build/android/java_cpp_template.gypi' ],
         },
       ],
      },
     ],
   ],
 }