Refactor build target for sync

sync/sync_api.gypi

Index: sync/sync_api.gypi
diff --git a/sync/sync_api.gypi b/sync/sync_api.gypi
deleted file mode 100644
index 8aaf7c7cdf1a9148a8025b7b8a5442e89ceb28de..0000000000000000000000000000000000000000
--- a/sync/sync_api.gypi
+++ /dev/null
@@ -1,51 +0,0 @@
-# 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.
-
-{
-  'include_dirs': [
-    '..',
-  ],
-  'defines': [
-    'SYNC_IMPLEMENTATION',
-  ],
-  'dependencies': [
-    '../base/base.gyp:base',
-  ],
-  'sources': [
-    'api/attachments/attachment.cc',
-    'api/attachments/attachment.h',
-    'api/attachments/attachment_downloader.cc',
-    'api/attachments/attachment_downloader.h',
-    'api/attachments/attachment_id.cc',
-    'api/attachments/attachment_id.h',
-    'api/attachments/attachment_service.cc',
-    'api/attachments/attachment_service.h',
-    'api/attachments/attachment_service_impl.cc',
-    'api/attachments/attachment_service_impl.h',
-    'api/attachments/attachment_service_proxy.cc',
-    'api/attachments/attachment_service_proxy.h',
-    'api/attachments/attachment_service_proxy_for_test.cc',
-    'api/attachments/attachment_service_proxy_for_test.h',
-    'api/attachments/attachment_store.cc',
-    'api/attachments/attachment_store.h',
-    'api/attachments/attachment_uploader.cc',
-    'api/attachments/attachment_uploader.h',
-    'api/string_ordinal.h',
-    'api/syncable_service.cc',
-    'api/syncable_service.h',
-    'api/sync_data.cc',
-    'api/sync_data.h',
-    'api/sync_change.cc',
-    'api/sync_change.h',
-    'api/sync_change_processor.cc',
-    'api/sync_change_processor.h',
-    'api/sync_error.cc',
-    'api/sync_error.h',
-    'api/sync_error_factory.cc',
-    'api/sync_error_factory.h',
-    'api/sync_merge_result.cc',
-    'api/sync_merge_result.h',
-    'api/time.h',
-  ],
-}