FileAPI: Split recursive remove into multiple async tasks

webkit/fileapi/webkit_fileapi.gypi

 # Copyright (c) 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.
 
 {
   'variables': {
     'webkit_fileapi_sources': [
       '../fileapi/external_mount_points.cc',
       '../fileapi/external_mount_points.h',
       '../fileapi/file_observers.h',
@@ skipping 61 matching lines @@
       '../fileapi/media/mtp_device_file_system_config.h',
       '../fileapi/media/native_media_file_util.cc',
       '../fileapi/media/native_media_file_util.h',
       '../fileapi/mount_points.cc',
       '../fileapi/mount_points.h',
       '../fileapi/native_file_util.cc',
       '../fileapi/native_file_util.h',
       '../fileapi/obfuscated_file_util.cc',
       '../fileapi/obfuscated_file_util.h',
       '../fileapi/remote_file_system_proxy.h',
+      '../fileapi/remove_operation_delegate.cc',
+      '../fileapi/remove_operation_delegate.h',
       '../fileapi/sandbox_file_stream_writer.cc',
       '../fileapi/sandbox_file_stream_writer.h',
       '../fileapi/sandbox_mount_point_provider.cc',
       '../fileapi/sandbox_mount_point_provider.h',
       '../fileapi/sandbox_quota_observer.cc',
       '../fileapi/sandbox_quota_observer.h',
       '../fileapi/syncable/file_change.cc',
       '../fileapi/syncable/file_change.h',
       '../fileapi/syncable/local_file_change_tracker.cc',
       '../fileapi/syncable/local_file_change_tracker.h',
@@ skipping 38 matching lines @@
     ],
     'webkit_fileapi_media_sources': [
       '../fileapi/media/device_media_file_util.cc',
       '../fileapi/media/device_media_file_util.h',
       '../fileapi/media/mtp_device_delegate.h',
       '../fileapi/media/mtp_device_map_service.cc',
       '../fileapi/media/mtp_device_map_service.h',
     ],
   },
 }