Introduce AttachmentStore metadata record

sync/sync_tests.gypi

 # Copyright 2013 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': [
     # Test support files for the 'sync_core' target.
     # GN version: //sync:test_support_sync_core
     {
       'target_name': 'test_support_sync_core',
@@ skipping 231 matching lines @@
       'dependencies': [
         '../base/base.gyp:base',
         '../base/base.gyp:run_all_unittests',
         '../google_apis/google_apis.gyp:google_apis',
         '../google_apis/google_apis.gyp:google_apis_test_support',
         '../net/net.gyp:net',
         '../net/net.gyp:net_test_support',
         '../sql/sql.gyp:sql',
         '../testing/gmock.gyp:gmock',
         '../testing/gtest.gyp:gtest',
+        '../third_party/leveldatabase/leveldatabase.gyp:leveldatabase',
         '../third_party/protobuf/protobuf.gyp:protobuf_lite',
         'sync',
         'test_support_sync_core',
         'test_support_sync_internal_api',
       ],
       'include_dirs': [
         '..',
       ],
       'sources': [
         'api/attachments/attachment_id_unittest.cc',
@@ skipping 227 matching lines @@
           ],
           'variables': {
             'test_suite_name': 'sync_unit_tests',
           },
           'includes': [ '../build/apk_test.gypi' ],
         },
       ],
     }],
   ],
 }