diff --git a/quic/test_tools/qpack/qpack_test_utils.cc b/quic/test_tools/qpack/qpack_test_utils.cc
new file mode 100644
index 0000000..faaddcb
--- /dev/null
+++ b/quic/test_tools/qpack/qpack_test_utils.cc
@@ -0,0 +1,23 @@
+// Copyright (c) 2018 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "net/third_party/quiche/src/quic/test_tools/qpack/qpack_test_utils.h"
+
+#include <limits>
+
+namespace quic {
+namespace test {
+
+FragmentSizeGenerator FragmentModeToFragmentSizeGenerator(
+    FragmentMode fragment_mode) {
+  switch (fragment_mode) {
+    case FragmentMode::kSingleChunk:
+      return []() { return std::numeric_limits<size_t>::max(); };
+    case FragmentMode::kOctetByOctet:
+      return []() { return 1; };
+  }
+}
+
+}  // namespace test
+}  // namespace quic