1 files changed, 2 insertions, 0 deletions
diff --git a/base/file_util_mac.mm b/base/file_util_mac.mm
index 811799c..43bf6e9 100644
--- a/base/file_util_mac.mm
+++ b/base/file_util_mac.mm
@@ -10,6 +10,7 @@
 #include "base/basictypes.h"
 #include "base/file_path.h"
 #include "base/string_util.h"
+#include "base/thread_restrictions.h"
 
 namespace file_util {
 
@@ -26,6 +27,7 @@ bool GetShmemTempDir(FilePath* path) {
 }
 
 bool CopyFile(const FilePath& from_path, const FilePath& to_path) {
+  base::ThreadRestrictions::AssertIOAllowed();
   return (copyfile(from_path.value().c_str(),
                    to_path.value().c_str(), NULL, COPYFILE_ALL) == 0);
 }