Sync: Avoid 3 passes over SyncDarta DB when loading the directory from the disk

sync/syncable/deferred_on_disk_directory_backing_store.cc

 // Copyright 2014 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 "sync/syncable/deferred_on_disk_directory_backing_store.h"
 
 #include "base/logging.h"
 #include "base/metrics/histogram.h"
 #include "base/stl_util.h"
 #include "sync/syncable/syncable-inl.h"
@@ skipping 34 matching lines @@
 
     db_is_on_disk_ = true;
   }
 
   return DirectoryBackingStore::SaveChanges(snapshot);
 }
 
 DirOpenResult DeferredOnDiskDirectoryBackingStore::Load(
     Directory::MetahandlesMap* handles_map,
     JournalIndex* delete_journals,
+    MetahandleSet* metahandles_to_purge,
     Directory::KernelLoadInfo* kernel_load_info) {
   // Open an in-memory database at first to create initial sync data needed by
   // Directory.
   CHECK(!db_->is_open());
   if (!db_->OpenInMemory())
     return FAILED_OPEN_DATABASE;
 
   if (!InitializeTables())
     return FAILED_OPEN_DATABASE;
-  if (!LoadEntries(handles_map))
+  if (!LoadEntries(handles_map, metahandles_to_purge))
     return FAILED_DATABASE_CORRUPT;
   if (!LoadInfo(kernel_load_info))
     return FAILED_DATABASE_CORRUPT;
 
   return OPENED;
 }
 
 }  // namespace syncable
 }  // namespace syncer