drive: CreateDirectory should only wait for its parent directory's load.

chrome/browser/chromeos/drive/file_system.cc

Index: chrome/browser/chromeos/drive/file_system.cc
diff --git a/chrome/browser/chromeos/drive/file_system.cc b/chrome/browser/chromeos/drive/file_system.cc
index 28cf8014280f2bcf51827d7ce4d89b296c5506eb..07ab21f380cb743d77d566af49e76f9c02aadb81 100644
--- a/chrome/browser/chromeos/drive/file_system.cc
+++ b/chrome/browser/chromeos/drive/file_system.cc
@@ -455,8 +455,9 @@ void FileSystem::CreateDirectory(
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   DCHECK(!callback.is_null());
 
-  change_list_loader_->LoadIfNeeded(
-      internal::DirectoryFetchInfo(),
+  // Ensure its parent directory is loaded to the local metadata.
+  LoadDirectoryIfNeeded(
+      directory_path.DirName(),
       base::Bind(&FileSystem::CreateDirectoryAfterLoad,
                  weak_ptr_factory_.GetWeakPtr(),
                  directory_path, is_exclusive, is_recursive, callback));