[SyncFS] Clear dirty flag on changelist application phase

chrome/browser/sync_file_system/drive_backend/metadata_database_index.cc

Index: chrome/browser/sync_file_system/drive_backend/metadata_database_index.cc
diff --git a/chrome/browser/sync_file_system/drive_backend/metadata_database_index.cc b/chrome/browser/sync_file_system/drive_backend/metadata_database_index.cc
index cdc6c3e5dbeb83d3029c9da6c5e3cf17c60ee0d6..44f550e40d510b378dcf43c1a84c1940cebc957f 100644
--- a/chrome/browser/sync_file_system/drive_backend/metadata_database_index.cc
+++ b/chrome/browser/sync_file_system/drive_backend/metadata_database_index.cc
@@ -390,6 +390,19 @@ int64 MetadataDatabaseIndex::PickDirtyTracker() const {
   return *dirty_trackers_.begin();
 }
 
+void MetadataDatabaseIndex::EnumerateDirtyTrackers(
+    const TrackerIDCallback& callback) const {
+  for (DirtyTrackers::iterator itr = dirty_trackers_.begin();
+       itr != dirty_trackers_.end(); ++itr) {
+    callback.Run(*itr);
+  }
+
+  for (DirtyTrackers::iterator itr = demoted_dirty_trackers_.begin();
+       itr != demoted_dirty_trackers_.end(); ++itr) {
+    callback.Run(*itr);
+  }
+}
+
 void MetadataDatabaseIndex::DemoteDirtyTracker(int64 tracker_id) {
   if (dirty_trackers_.erase(tracker_id))
     demoted_dirty_trackers_.insert(tracker_id);