Update from https://crrev.com/305340

tools/clang/translation_unit/test_files/binomial.h

Index: tools/clang/translation_unit/test_files/binomial.h
diff --git a/tools/clang/translation_unit/test_files/binomial.h b/tools/clang/translation_unit/test_files/binomial.h
new file mode 100644
index 0000000000000000000000000000000000000000..c67b273f658665c20ca4a51972b3d01c0aa1a766
--- /dev/null
+++ b/tools/clang/translation_unit/test_files/binomial.h
@@ -0,0 +1,12 @@
+// Copyright (c) 2014 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.
+//
+#ifndef TOOLS_CLANG_TRANSLATION_UNIT_TEST_FILES_BINOMIAL_H_
+#define TOOLS_CLANG_TRANSLATION_UNIT_TEST_FILES_BINOMIAL_H_
+
+int binomial(int n, int k) {
+  return k > 0 ? binomial(n - 1, k - 1) * n / k : 1;
+}
+
+#endif  // TOOLS_CLANG_TRANSLATION_UNIT_TEST_FILES_BINOMIAL_H_