[Retry] PPAPI: Add new PPB_FileRef.MakeDirectory to support exclusive operation

native_client_sdk/src/doc/devguide/coding/file-io.rst

Index: native_client_sdk/src/doc/devguide/coding/file-io.rst
diff --git a/native_client_sdk/src/doc/devguide/coding/file-io.rst b/native_client_sdk/src/doc/devguide/coding/file-io.rst
index fd2a38c657c1f48f9c72acb865bd41cbd68bb16d..b63f3c89e05db5c867270d7bd429d05deac9537b 100644
--- a/native_client_sdk/src/doc/devguide/coding/file-io.rst
+++ b/native_client_sdk/src/doc/devguide/coding/file-io.rst
@@ -548,7 +548,8 @@ Then the ``pp::FileRef::MakeDirectory`` function is called.
 
 .. naclcode::
 
-  int32_t result = ref.MakeDirectory(pp::BlockUntilComplete());
+  int32_t result = ref.MakeDirectory(
+      PP_MAKEDIRECTORYFLAG_NONE, pp::BlockUntilComplete());
   if (result != PP_OK) {
     ShowErrorMessage("Make directory failed", result);
     return;