Add a minimal AttachmentUploaderImpl.

sync/sync_internal_api.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.
 
 {
   'include_dirs': [
     '..',
   ],
   'defines': [
     'SYNC_IMPLEMENTATION',
   ],
   'dependencies': [
     '../base/base.gyp:base',
     '../net/net.gyp:net',
     '../third_party/zlib/zlib.gyp:zlib',
     '../url/url.gyp:url_lib',
   ],
   'sources': [
+    'internal_api/attachments/attachment_server_url_builder.cc',
+    'internal_api/attachments/attachment_uploader_impl.cc',
     'internal_api/attachments/fake_attachment_store.cc',
     'internal_api/attachments/fake_attachment_uploader.cc',
     'internal_api/base_node.cc',
     'internal_api/base_transaction.cc',
     'internal_api/change_record.cc',
     'internal_api/change_reorder_buffer.cc',
     'internal_api/change_reorder_buffer.h',
     'internal_api/debug_info_event_listener.cc',
     'internal_api/debug_info_event_listener.h',
     'internal_api/delete_journal.cc',
     'internal_api/events/commit_request_event.cc',
     'internal_api/events/commit_response_event.cc',
     'internal_api/events/configure_get_updates_request_event.cc',
     'internal_api/events/get_updates_response_event.cc',
     'internal_api/events/normal_get_updates_request_event.cc',
     'internal_api/events/poll_get_updates_request_event.cc',
     'internal_api/events/protocol_event.cc',
     'internal_api/http_bridge.cc',
     'internal_api/http_bridge_network_resources.cc',
     'internal_api/internal_components_factory_impl.cc',
     'internal_api/js_mutation_event_observer.cc',
     'internal_api/js_mutation_event_observer.h',
     'internal_api/js_sync_encryption_handler_observer.cc',
     'internal_api/js_sync_encryption_handler_observer.h',
     'internal_api/js_sync_manager_observer.cc',
     'internal_api/js_sync_manager_observer.h',
     'internal_api/non_blocking_type_processor.cc',
     'internal_api/protocol_event_buffer.cc',
     'internal_api/protocol_event_buffer.h',
+    'internal_api/public/attachments/attachment_server_url_builder.h',
+    'internal_api/public/attachments/attachment_uploader_impl.h',
     'internal_api/public/attachments/fake_attachment_store.h',
     'internal_api/public/attachments/fake_attachment_uploader.h',
     'internal_api/public/base/ack_handle.cc',
     'internal_api/public/base/ack_handle.h',
     'internal_api/public/base/attachment_id_proto.cc',
     'internal_api/public/base/attachment_id_proto.h',
     'internal_api/public/base/cancelation_observer.cc',
     'internal_api/public/base/cancelation_observer.h',
     'internal_api/public/base/cancelation_signal.cc',
     'internal_api/public/base/cancelation_signal.h',
@@ skipping 97 matching lines @@
     'internal_api/sync_rollback_manager_base.h',
     'internal_api/syncapi_internal.cc',
     'internal_api/syncapi_internal.h',
     'internal_api/syncapi_server_connection_manager.cc',
     'internal_api/syncapi_server_connection_manager.h',
     'internal_api/user_share.cc',
     'internal_api/write_node.cc',
     'internal_api/write_transaction.cc',
   ],
 }