Fix for finding a disabled origin after it was already moved to enabled.

chrome/browser/sync_file_system/remote_file_sync_service.h

Index: chrome/browser/sync_file_system/remote_file_sync_service.h
diff --git a/chrome/browser/sync_file_system/remote_file_sync_service.h b/chrome/browser/sync_file_system/remote_file_sync_service.h
index 0deb9c410094f3556602ff0fcfbea932593bcbd5..40b57cbd96b2e7b506e46ff1b8d8d900b9d8c9d0 100644
--- a/chrome/browser/sync_file_system/remote_file_sync_service.h
+++ b/chrome/browser/sync_file_system/remote_file_sync_service.h
@@ -100,6 +100,8 @@ class RemoteFileSyncService {
       const GURL& origin,
       const SyncStatusCallback& callback) = 0;
 
+  // Re-enables |origin| that was previously disabled. If |origin| is not a
+  // SyncFS app, then the origin is effectively ignored.
   virtual void EnableOriginForTrackingChanges(
       const GURL& origin,
       const SyncStatusCallback& callback) = 0;