src/chrome/browser/sync_file_system/drive_backend_v1/local_sync_delegate.cc

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "chrome/browser/sync_file_system/drive_backend_v1/local_sync_delegate.h"
   6
   7 #include "base/bind.h"
   8 #include "base/callback.h"
   9 #include "chrome/browser/sync_file_system/conflict_resolution_resolver.h"
  10 #include "chrome/browser/sync_file_system/drive_backend_v1/api_util.h"
  11 #include "chrome/browser/sync_file_system/drive_backend_v1/drive_metadata_store.h"
  12 #include "chrome/browser/sync_file_system/logger.h"
  13 #include "chrome/browser/sync_file_system/syncable_file_system_util.h"
  14
  15 namespace sync_file_system {
  16 namespace drive_backend {
  17
  18 LocalSyncDelegate::LocalSyncDelegate(
  19     DriveFileSyncService* sync_service,
  20     const FileChange& local_change,
  21     const base::FilePath& local_path,
  22     const SyncFileMetadata& local_metadata,
  23     const fileapi::FileSystemURL& url)
  24     : sync_service_(sync_service),
  25       operation_(SYNC_OPERATION_NONE),
  26       url_(url),
  27       local_change_(local_change),
  28       local_path_(local_path),
  29       local_metadata_(local_metadata),
  30       has_drive_metadata_(false),
  31       has_remote_change_(false),
  32       weak_factory_(this) {}
  33
  34 LocalSyncDelegate::~LocalSyncDelegate() {}
  35
  36 void LocalSyncDelegate::Run(const SyncStatusCallback& callback) {
  37   // TODO(nhiroki): support directory operations (http://crbug.com/161442).
  38   DCHECK(IsSyncFSDirectoryOperationEnabled() || !local_change_.IsDirectory());
  39   operation_ = SYNC_OPERATION_NONE;
  40
  41   has_drive_metadata_ =
  42       metadata_store()->ReadEntry(url_, &drive_metadata_) == SYNC_STATUS_OK;
  43
  44   if (!has_drive_metadata_)
  45     drive_metadata_.set_md5_checksum(std::string());
  46
  47   sync_service_->EnsureOriginRootDirectory(
  48       url_.origin(),
  49       base::Bind(&LocalSyncDelegate::DidGetOriginRoot,
  50                  weak_factory_.GetWeakPtr(),
  51                  callback));
  52 }
  53
  54 void LocalSyncDelegate::DidGetOriginRoot(
  55     const SyncStatusCallback& callback,
  56     SyncStatusCode status,
  57     const std::string& origin_resource_id) {
  58   if (status != SYNC_STATUS_OK) {
  59     callback.Run(status);
  60     return;
  61   }
  62
  63   origin_resource_id_ = origin_resource_id;
  64
  65   has_remote_change_ =
  66       remote_change_handler()->GetChangeForURL(url_, &remote_change_);
  67   if (has_remote_change_ && drive_metadata_.resource_id().empty())
  68     drive_metadata_.set_resource_id(remote_change_.resource_id);
  69
  70   SyncFileType remote_file_type =
  71       has_remote_change_ ? remote_change_.change.file_type() :
  72       has_drive_metadata_ ?
  73           DriveFileSyncService::DriveMetadataResourceTypeToSyncFileType(
  74               drive_metadata_.type())
  75       : SYNC_FILE_TYPE_UNKNOWN;
  76
  77   DCHECK_EQ(SYNC_OPERATION_NONE, operation_);
  78   operation_ = LocalSyncOperationResolver::Resolve(
  79       local_change_,
  80       has_remote_change_ ? &remote_change_.change : NULL,
  81       has_drive_metadata_ ? &drive_metadata_ : NULL);
  82
  83   util::Log(logging::LOG_VERBOSE, FROM_HERE,
  84             "ApplyLocalChange for %s local_change:%s ===> %s",
  85             url_.DebugString().c_str(),
  86             local_change_.DebugString().c_str(),
  87             SyncOperationTypeToString(operation_));
  88
  89   switch (operation_) {
  90     case SYNC_OPERATION_ADD_FILE:
  91       UploadNewFile(callback);
  92       return;
  93     case SYNC_OPERATION_ADD_DIRECTORY:
  94       CreateDirectory(callback);
  95       return;
  96     case SYNC_OPERATION_UPDATE_FILE:
  97       UploadExistingFile(callback);
  98       return;
  99     case SYNC_OPERATION_DELETE:
 100       Delete(callback);
 101       return;
 102     case SYNC_OPERATION_NONE:
 103       callback.Run(SYNC_STATUS_OK);
 104       return;
 105     case SYNC_OPERATION_CONFLICT:
 106       HandleConflict(callback);
 107       return;
 108     case SYNC_OPERATION_RESOLVE_TO_LOCAL:
 109       ResolveToLocal(callback);
 110       return;
 111     case SYNC_OPERATION_RESOLVE_TO_REMOTE:
 112       ResolveToRemote(callback, remote_file_type);
 113       return;
 114     case SYNC_OPERATION_DELETE_METADATA:
 115       DeleteMetadata(base::Bind(
 116           &LocalSyncDelegate::DidApplyLocalChange,
 117           weak_factory_.GetWeakPtr(), callback, google_apis::HTTP_SUCCESS));
 118       return;
 119     case SYNC_OPERATION_FAIL: {
 120       callback.Run(SYNC_STATUS_FAILED);
 121       return;
 122     }
 123   }
 124   NOTREACHED();
 125   callback.Run(SYNC_STATUS_FAILED);
 126 }
 127
 128 void LocalSyncDelegate::UploadNewFile(const SyncStatusCallback& callback) {
 129   api_util()->UploadNewFile(
 130       origin_resource_id_,
 131       local_path_,
 132       DriveFileSyncService::PathToTitle(url_.path()),
 133       base::Bind(&LocalSyncDelegate::DidUploadNewFile,
 134                  weak_factory_.GetWeakPtr(), callback));
 135 }
 136
 137 void LocalSyncDelegate::DidUploadNewFile(
 138     const SyncStatusCallback& callback,
 139     google_apis::GDataErrorCode error,
 140     const std::string& resource_id,
 141     const std::string& md5) {
 142   switch (error) {
 143     case google_apis::HTTP_CREATED:
 144       UpdateMetadata(
 145           resource_id, md5, DriveMetadata::RESOURCE_TYPE_FILE,
 146           base::Bind(&LocalSyncDelegate::DidApplyLocalChange,
 147                      weak_factory_.GetWeakPtr(), callback, error));
 148       sync_service_->NotifyObserversFileStatusChanged(
 149           url_,
 150           SYNC_FILE_STATUS_SYNCED,
 151           SYNC_ACTION_ADDED,
 152           SYNC_DIRECTION_LOCAL_TO_REMOTE);
 153       return;
 154     case google_apis::HTTP_CONFLICT:
 155       HandleCreationConflict(resource_id, DriveMetadata::RESOURCE_TYPE_FILE,
 156                              callback);
 157       return;
 158     default:
 159       callback.Run(GDataErrorCodeToSyncStatusCodeWrapper(error));
 160   }
 161 }
 162
 163 void LocalSyncDelegate::CreateDirectory(const SyncStatusCallback& callback) {
 164   DCHECK(IsSyncFSDirectoryOperationEnabled());
 165   api_util()->CreateDirectory(
 166       origin_resource_id_,
 167       DriveFileSyncService::PathToTitle(url_.path()),
 168       base::Bind(&LocalSyncDelegate::DidCreateDirectory,
 169                  weak_factory_.GetWeakPtr(), callback));
 170 }
 171
 172 void LocalSyncDelegate::DidCreateDirectory(
 173     const SyncStatusCallback& callback,
 174     google_apis::GDataErrorCode error,
 175     const std::string& resource_id) {
 176   switch (error) {
 177     case google_apis::HTTP_SUCCESS:
 178     case google_apis::HTTP_CREATED: {
 179       UpdateMetadata(
 180           resource_id, std::string(), DriveMetadata::RESOURCE_TYPE_FOLDER,
 181           base::Bind(&LocalSyncDelegate::DidApplyLocalChange,
 182                      weak_factory_.GetWeakPtr(), callback, error));
 183       sync_service_->NotifyObserversFileStatusChanged(
 184           url_,
 185           SYNC_FILE_STATUS_SYNCED,
 186           SYNC_ACTION_ADDED,
 187           SYNC_DIRECTION_LOCAL_TO_REMOTE);
 188       return;
 189     }
 190
 191     case google_apis::HTTP_CONFLICT:
 192       // There were conflicts and a file was left.
 193       // TODO(kinuko): Handle the latter case (http://crbug.com/237090).
 194       // Fall-through
 195
 196     default:
 197       callback.Run(GDataErrorCodeToSyncStatusCodeWrapper(error));
 198   }
 199 }
 200
 201 void LocalSyncDelegate::UploadExistingFile(const SyncStatusCallback& callback) {
 202   DCHECK(has_drive_metadata_);
 203   if (drive_metadata_.resource_id().empty()) {
 204     UploadNewFile(callback);
 205     return;
 206   }
 207
 208   api_util()->UploadExistingFile(
 209       drive_metadata_.resource_id(),
 210       drive_metadata_.md5_checksum(),
 211       local_path_,
 212       base::Bind(&LocalSyncDelegate::DidUploadExistingFile,
 213                  weak_factory_.GetWeakPtr(), callback));
 214 }
 215
 216 void LocalSyncDelegate::DidUploadExistingFile(
 217     const SyncStatusCallback& callback,
 218     google_apis::GDataErrorCode error,
 219     const std::string& resource_id,
 220     const std::string& md5) {
 221   DCHECK(has_drive_metadata_);
 222   switch (error) {
 223     case google_apis::HTTP_SUCCESS:
 224       UpdateMetadata(
 225           resource_id, md5, DriveMetadata::RESOURCE_TYPE_FILE,
 226           base::Bind(&LocalSyncDelegate::DidApplyLocalChange,
 227                      weak_factory_.GetWeakPtr(), callback, error));
 228       sync_service_->NotifyObserversFileStatusChanged(
 229           url_,
 230           SYNC_FILE_STATUS_SYNCED,
 231           SYNC_ACTION_UPDATED,
 232           SYNC_DIRECTION_LOCAL_TO_REMOTE);
 233       return;
 234     case google_apis::HTTP_CONFLICT:
 235       HandleConflict(callback);
 236       return;
 237     case google_apis::HTTP_NOT_MODIFIED:
 238       DidApplyLocalChange(callback,
 239                           google_apis::HTTP_SUCCESS, SYNC_STATUS_OK);
 240       return;
 241     case google_apis::HTTP_NOT_FOUND:
 242       UploadNewFile(callback);
 243       return;
 244     default: {
 245       const SyncStatusCode status =
 246           GDataErrorCodeToSyncStatusCodeWrapper(error);
 247       DCHECK_NE(SYNC_STATUS_OK, status);
 248       callback.Run(status);
 249       return;
 250     }
 251   }
 252 }
 253
 254 void LocalSyncDelegate::Delete(const SyncStatusCallback& callback) {
 255   if (!has_drive_metadata_) {
 256     callback.Run(SYNC_STATUS_OK);
 257     return;
 258   }
 259
 260   if (drive_metadata_.resource_id().empty()) {
 261     DidDelete(callback, google_apis::HTTP_NOT_FOUND);
 262     return;
 263   }
 264
 265   api_util()->DeleteFile(
 266       drive_metadata_.resource_id(),
 267       drive_metadata_.md5_checksum(),
 268       base::Bind(&LocalSyncDelegate::DidDelete,
 269                  weak_factory_.GetWeakPtr(), callback));
 270 }
 271
 272 void LocalSyncDelegate::DidDelete(
 273     const SyncStatusCallback& callback,
 274     google_apis::GDataErrorCode error) {
 275   DCHECK(has_drive_metadata_);
 276
 277   switch (error) {
 278     case google_apis::HTTP_SUCCESS:
 279     case google_apis::HTTP_NOT_FOUND:
 280       DeleteMetadata(base::Bind(
 281           &LocalSyncDelegate::DidApplyLocalChange,
 282           weak_factory_.GetWeakPtr(), callback, google_apis::HTTP_SUCCESS));
 283       sync_service_->NotifyObserversFileStatusChanged(
 284           url_,
 285           SYNC_FILE_STATUS_SYNCED,
 286           SYNC_ACTION_DELETED,
 287           SYNC_DIRECTION_LOCAL_TO_REMOTE);
 288       return;
 289     case google_apis::HTTP_PRECONDITION:
 290     case google_apis::HTTP_CONFLICT:
 291       // Delete |drive_metadata| on the conflict case.
 292       // Conflicted remote change should be applied as a future remote change.
 293       DeleteMetadata(base::Bind(
 294           &LocalSyncDelegate::DidDeleteMetadataForDeletionConflict,
 295           weak_factory_.GetWeakPtr(), callback));
 296       sync_service_->NotifyObserversFileStatusChanged(
 297           url_,
 298           SYNC_FILE_STATUS_SYNCED,
 299           SYNC_ACTION_DELETED,
 300           SYNC_DIRECTION_LOCAL_TO_REMOTE);
 301       return;
 302     default: {
 303       const SyncStatusCode status =
 304           GDataErrorCodeToSyncStatusCodeWrapper(error);
 305       DCHECK_NE(SYNC_STATUS_OK, status);
 306       callback.Run(status);
 307       return;
 308     }
 309   }
 310 }
 311
 312 void LocalSyncDelegate::DidDeleteMetadataForDeletionConflict(
 313     const SyncStatusCallback& callback,
 314     SyncStatusCode status) {
 315   callback.Run(SYNC_STATUS_OK);
 316 }
 317
 318 void LocalSyncDelegate::ResolveToLocal(const SyncStatusCallback& callback) {
 319   if (drive_metadata_.resource_id().empty()) {
 320     DidDeleteFileToResolveToLocal(callback, google_apis::HTTP_NOT_FOUND);
 321     return;
 322   }
 323
 324   api_util()->DeleteFile(
 325       drive_metadata_.resource_id(),
 326       drive_metadata_.md5_checksum(),
 327       base::Bind(
 328           &LocalSyncDelegate::DidDeleteFileToResolveToLocal,
 329           weak_factory_.GetWeakPtr(), callback));
 330 }
 331
 332 void LocalSyncDelegate::DidDeleteFileToResolveToLocal(
 333     const SyncStatusCallback& callback,
 334     google_apis::GDataErrorCode error) {
 335   if (error != google_apis::HTTP_SUCCESS &&
 336       error != google_apis::HTTP_NOT_FOUND) {
 337     callback.Run(GDataErrorCodeToSyncStatusCodeWrapper(error));
 338     return;
 339   }
 340
 341   DCHECK_NE(SYNC_FILE_TYPE_UNKNOWN, local_metadata_.file_type);
 342   if (local_metadata_.file_type == SYNC_FILE_TYPE_FILE) {
 343     UploadNewFile(callback);
 344     return;
 345   }
 346
 347   DCHECK(IsSyncFSDirectoryOperationEnabled());
 348   DCHECK_EQ(SYNC_FILE_TYPE_DIRECTORY, local_metadata_.file_type);
 349   CreateDirectory(callback);
 350 }
 351
 352 void LocalSyncDelegate::ResolveToRemote(
 353     const SyncStatusCallback& callback,
 354     SyncFileType remote_file_type) {
 355   // Mark the file as to-be-fetched.
 356   DCHECK(!drive_metadata_.resource_id().empty());
 357
 358   SetMetadataToBeFetched(
 359       DriveFileSyncService::SyncFileTypeToDriveMetadataResourceType(
 360           remote_file_type),
 361       base::Bind(&LocalSyncDelegate::DidResolveToRemote,
 362                  weak_factory_.GetWeakPtr(), callback));
 363   // The synced notification will be dispatched when the remote file is
 364   // downloaded.
 365 }
 366
 367 void LocalSyncDelegate::DidResolveToRemote(
 368     const SyncStatusCallback& callback,
 369     SyncStatusCode status) {
 370   DCHECK(has_drive_metadata_);
 371   if (status != SYNC_STATUS_OK) {
 372     callback.Run(status);
 373     return;
 374   }
 375
 376   SyncFileType file_type = SYNC_FILE_TYPE_FILE;
 377   if (drive_metadata_.type() == DriveMetadata::RESOURCE_TYPE_FOLDER)
 378     file_type = SYNC_FILE_TYPE_DIRECTORY;
 379   sync_service_->AppendFetchChange(
 380       url_.origin(), url_.path(), drive_metadata_.resource_id(), file_type);
 381   callback.Run(status);
 382 }
 383
 384 void LocalSyncDelegate::DidApplyLocalChange(
 385     const SyncStatusCallback& callback,
 386     const google_apis::GDataErrorCode error,
 387     SyncStatusCode status) {
 388   if ((operation_ == SYNC_OPERATION_DELETE ||
 389        operation_ == SYNC_OPERATION_DELETE_METADATA) &&
 390       (status == SYNC_FILE_ERROR_NOT_FOUND ||
 391        status == SYNC_DATABASE_ERROR_NOT_FOUND)) {
 392     status = SYNC_STATUS_OK;
 393   }
 394
 395   if (status == SYNC_STATUS_OK) {
 396     remote_change_handler()->RemoveChangeForURL(url_);
 397     status = GDataErrorCodeToSyncStatusCodeWrapper(error);
 398   }
 399   callback.Run(status);
 400 }
 401
 402 void LocalSyncDelegate::UpdateMetadata(
 403     const std::string& resource_id,
 404     const std::string& md5,
 405     DriveMetadata::ResourceType type,
 406     const SyncStatusCallback& callback) {
 407   has_drive_metadata_ = true;
 408   drive_metadata_.set_resource_id(resource_id);
 409   drive_metadata_.set_md5_checksum(md5);
 410   drive_metadata_.set_conflicted(false);
 411   drive_metadata_.set_to_be_fetched(false);
 412   drive_metadata_.set_type(type);
 413   metadata_store()->UpdateEntry(url_, drive_metadata_, callback);
 414 }
 415
 416 void LocalSyncDelegate::ResetMetadataForStartOver(
 417     const SyncStatusCallback& callback) {
 418   has_drive_metadata_ = true;
 419   DCHECK(!drive_metadata_.resource_id().empty());
 420   drive_metadata_.set_md5_checksum(std::string());
 421   drive_metadata_.set_conflicted(false);
 422   drive_metadata_.set_to_be_fetched(false);
 423   metadata_store()->UpdateEntry(url_, drive_metadata_, callback);
 424 }
 425
 426 void LocalSyncDelegate::SetMetadataToBeFetched(
 427     DriveMetadata::ResourceType type,
 428     const SyncStatusCallback& callback) {
 429   has_drive_metadata_ = true;
 430   drive_metadata_.set_md5_checksum(std::string());
 431   drive_metadata_.set_conflicted(false);
 432   drive_metadata_.set_to_be_fetched(true);
 433   drive_metadata_.set_type(type);
 434   metadata_store()->UpdateEntry(url_, drive_metadata_, callback);
 435 }
 436
 437 void LocalSyncDelegate::DeleteMetadata(const SyncStatusCallback& callback) {
 438   metadata_store()->DeleteEntry(url_, callback);
 439 }
 440
 441 void LocalSyncDelegate::HandleCreationConflict(
 442     const std::string& resource_id,
 443     DriveMetadata::ResourceType type,
 444     const SyncStatusCallback& callback) {
 445   // File-file conflict is found.
 446   // Populates a fake drive_metadata and set has_drive_metadata = true.
 447   // In HandleConflictLocalSync:
 448   // - If conflict_resolution is manual, we'll change conflicted to true
 449   //   and save the metadata.
 450   // - Otherwise we'll save the metadata with empty md5 and will start
 451   //   over local sync as UploadExistingFile.
 452   drive_metadata_.set_resource_id(resource_id);
 453   drive_metadata_.set_md5_checksum(std::string());
 454   drive_metadata_.set_conflicted(false);
 455   drive_metadata_.set_to_be_fetched(false);
 456   drive_metadata_.set_type(type);
 457   has_drive_metadata_ = true;
 458   HandleConflict(callback);
 459 }
 460
 461 void LocalSyncDelegate::HandleConflict(const SyncStatusCallback& callback) {
 462   DCHECK(!drive_metadata_.resource_id().empty());
 463   api_util()->GetResourceEntry(
 464       drive_metadata_.resource_id(),
 465       base::Bind(
 466           &LocalSyncDelegate::DidGetEntryForConflictResolution,
 467           weak_factory_.GetWeakPtr(), callback));
 468 }
 469
 470 void LocalSyncDelegate::DidGetEntryForConflictResolution(
 471     const SyncStatusCallback& callback,
 472     google_apis::GDataErrorCode error,
 473     scoped_ptr<google_apis::ResourceEntry> entry) {
 474   SyncFileType remote_file_type = SYNC_FILE_TYPE_UNKNOWN;
 475   ConflictResolution resolution = CONFLICT_RESOLUTION_UNKNOWN;
 476
 477   if (error != google_apis::HTTP_SUCCESS ||
 478       entry->updated_time().is_null()) {
 479     resolution = CONFLICT_RESOLUTION_LOCAL_WIN;
 480   } else {
 481     SyncFileType local_file_type = local_metadata_.file_type;
 482     base::Time local_modification_time = local_metadata_.last_modified;
 483     base::Time remote_modification_time = entry->updated_time();
 484     if (entry->is_file())
 485       remote_file_type = SYNC_FILE_TYPE_FILE;
 486     else if (entry->is_folder())
 487       remote_file_type = SYNC_FILE_TYPE_DIRECTORY;
 488     else
 489       remote_file_type = SYNC_FILE_TYPE_UNKNOWN;
 490
 491     resolution = conflict_resolution_resolver()->Resolve(
 492         local_file_type, local_modification_time,
 493         remote_file_type, remote_modification_time);
 494   }
 495
 496   switch (resolution) {
 497     case CONFLICT_RESOLUTION_MARK_CONFLICT:
 498       HandleManualResolutionCase(callback);
 499       return;
 500     case CONFLICT_RESOLUTION_LOCAL_WIN:
 501       HandleLocalWinCase(callback);
 502       return;
 503     case CONFLICT_RESOLUTION_REMOTE_WIN:
 504       HandleRemoteWinCase(callback, remote_file_type);
 505       return;
 506     case CONFLICT_RESOLUTION_UNKNOWN:
 507       NOTREACHED();
 508   }
 509   NOTREACHED();
 510   callback.Run(SYNC_STATUS_FAILED);
 511 }
 512
 513 void LocalSyncDelegate::HandleManualResolutionCase(
 514     const SyncStatusCallback& callback) {
 515   if (drive_metadata_.conflicted()) {
 516     callback.Run(SYNC_STATUS_HAS_CONFLICT);
 517     return;
 518   }
 519
 520   has_drive_metadata_ = true;
 521   sync_service_->MarkConflict(
 522       url_, &drive_metadata_,
 523       base::Bind(&LocalSyncDelegate::DidMarkConflict,
 524                  weak_factory_.GetWeakPtr(), callback));
 525 }
 526
 527 void LocalSyncDelegate::DidMarkConflict(
 528     const SyncStatusCallback& callback,
 529     SyncStatusCode status) {
 530   DidApplyLocalChange(callback, google_apis::HTTP_CONFLICT, status);
 531 }
 532
 533 void LocalSyncDelegate::HandleLocalWinCase(
 534     const SyncStatusCallback& callback) {
 535   util::Log(logging::LOG_VERBOSE, FROM_HERE,
 536             "Resolving conflict for local sync: %s: LOCAL WIN",
 537             url_.DebugString().c_str());
 538
 539   DCHECK(!drive_metadata_.resource_id().empty());
 540   if (!has_drive_metadata_) {
 541     StartOver(callback, SYNC_STATUS_OK);
 542     return;
 543   }
 544
 545   ResetMetadataForStartOver(base::Bind(&LocalSyncDelegate::StartOver,
 546                                        weak_factory_.GetWeakPtr(), callback));
 547 }
 548
 549 void LocalSyncDelegate::HandleRemoteWinCase(
 550     const SyncStatusCallback& callback,
 551     SyncFileType remote_file_type) {
 552   util::Log(logging::LOG_VERBOSE, FROM_HERE,
 553             "Resolving conflict for local sync: %s: REMOTE WIN",
 554             url_.DebugString().c_str());
 555   ResolveToRemote(callback, remote_file_type);
 556 }
 557
 558 void LocalSyncDelegate::StartOver(const SyncStatusCallback& callback,
 559                                   SyncStatusCode status) {
 560   if (status != SYNC_STATUS_OK) {
 561     callback.Run(status);
 562     return;
 563   }
 564
 565   remote_change_handler()->RemoveChangeForURL(url_);
 566
 567   // Return the control back to the sync service once.
 568   callback.Run(SYNC_STATUS_RETRY);
 569 }
 570
 571 SyncStatusCode
 572 LocalSyncDelegate::GDataErrorCodeToSyncStatusCodeWrapper(
 573     google_apis::GDataErrorCode error) {
 574   return sync_service_->GDataErrorCodeToSyncStatusCodeWrapper(error);
 575 }
 576
 577 DriveMetadataStore* LocalSyncDelegate::metadata_store() {
 578   return sync_service_->metadata_store_.get();
 579 }
 580
 581 APIUtilInterface* LocalSyncDelegate::api_util() {
 582   return sync_service_->api_util_.get();
 583 }
 584
 585 RemoteChangeHandler* LocalSyncDelegate::remote_change_handler() {
 586   return &sync_service_->remote_change_handler_;
 587 }
 588
 589 ConflictResolutionResolver* LocalSyncDelegate::conflict_resolution_resolver() {
 590   return &sync_service_->conflict_resolution_resolver_;
 591 }
 592
 593 }  // namespace drive_backend
 594 }  // namespace sync_file_system