PPAPI: Add new PPB_FileRef.MakeDirectory to support exclusive operation

ppapi/tests/test_file_io.cc

Index: ppapi/tests/test_file_io.cc
diff --git a/ppapi/tests/test_file_io.cc b/ppapi/tests/test_file_io.cc
index f699ba15592e3d06daeb3fa932b98db22449afb9..0f1eb253592f74710bbbb3d5b2cf233610d2f8dd 100644
--- a/ppapi/tests/test_file_io.cc
+++ b/ppapi/tests/test_file_io.cc
@@ -296,7 +296,8 @@ std::string TestFileIO::TestOpenDirectory() {
 
   // Make a directory.
   pp::FileRef dir_ref(file_system, "/test_dir_open_directory");
-  callback.WaitForResult(dir_ref.MakeDirectory(callback.GetCallback()));
+  callback.WaitForResult(dir_ref.MakeDirectory(
+      false, false, callback.GetCallback()));
   CHECK_CALLBACK_BEHAVIOR(callback);
   ASSERT_EQ(PP_OK, callback.result());