1 files changed, 3 insertions, 0 deletions
diff --git a/chrome/browser/chromeos/drive/file_write_watcher.h b/chrome/browser/chromeos/drive/file_write_watcher.h
index 63ee9f5..68004ca 100644
--- a/chrome/browser/chromeos/drive/file_write_watcher.h
+++ b/chrome/browser/chromeos/drive/file_write_watcher.h
@@ -7,6 +7,7 @@
 
 #include "base/callback_forward.h"
 #include "base/memory/scoped_ptr.h"
+#include "base/threading/thread_checker.h"
 #include "chrome/browser/chromeos/drive/file_system_util.h"
 
 namespace base {
@@ -54,6 +55,8 @@ class FileWriteWatcher {
   class FileWriteWatcherImpl;
   scoped_ptr<FileWriteWatcherImpl, util::DestroyHelper> watcher_impl_;
 
+  base::ThreadChecker thread_checker_;
+
   DISALLOW_COPY_AND_ASSIGN(FileWriteWatcher);
 };