[SyncFS] Rephrase "LowerPriority" to "Demoted" in MetadataDatabase

chrome/browser/sync_file_system/drive_backend/sync_worker.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 "chrome/browser/sync_file_system/drive_backend/sync_worker.h"
 
 #include <vector>
 
 #include "base/bind.h"
 #include "chrome/browser/drive/drive_service_interface.h"
@@ skipping 216 matching lines @@
       observers_,
       UpdateServiceState(
           GetCurrentState(),
           enabled ? "Sync is enabled" : "Sync is disabled"));
 }
 
 void SyncWorker::PromoteDemotedChanges(const base::Closure& callback) {
   DCHECK(sequence_checker_.CalledOnValidSequencedThread());
 
   MetadataDatabase* metadata_db = GetMetadataDatabase();
-  if (metadata_db && metadata_db->HasLowPriorityDirtyTracker()) {
-    metadata_db->PromoteLowerPriorityTrackersToNormal();
+  if (metadata_db && metadata_db->HasDemotedDirtyTracker()) {
+    metadata_db->PromoteDemotedTrackers();
     FOR_EACH_OBSERVER(
         Observer,
         observers_,
         OnPendingFileListUpdated(metadata_db->CountDirtyTracker()));
   }
   callback.Run();
 }
 
 void SyncWorker::ApplyLocalChange(const FileChange& local_change,
                                   const base::FilePath& local_path,
@@ skipping 462 matching lines @@
   return context_->GetDriveUploader();
 }
 
 MetadataDatabase* SyncWorker::GetMetadataDatabase() {
   DCHECK(sequence_checker_.CalledOnValidSequencedThread());
   return context_->GetMetadataDatabase();
 }
 
 }  // namespace drive_backend
 }  // namespace sync_file_system