Add QUICHE_ARRAYSIZE.

gfe-relnote: n/a, adding unused code.
PiperOrigin-RevId: 285454180
Change-Id: I8c88eb4c39f8456ffccd33f7f04b1675ac14cf76

common/platform/api/quiche_arraysize.h

diff --git a/common/platform/api/quiche_arraysize.h b/common/platform/api/quiche_arraysize.h
new file mode 100644
index 0000000..9e50d17
--- /dev/null
+++ b/common/platform/api/quiche_arraysize.h
@@ -0,0 +1,12 @@
+// Copyright 2019 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 QUICHE_COMMON_PLATFORM_API_QUICHE_ARRAYSIZE_H_
+#define QUICHE_COMMON_PLATFORM_API_QUICHE_ARRAYSIZE_H_
+
+#include "net/quiche/common/platform/impl/quiche_arraysize_impl.h"
+
+#define QUICHE_ARRAYSIZE(array) QUICHE_ARRAYSIZE_IMPL(array)
+
+#endif  // QUICHE_COMMON_PLATFORM_API_QUICHE_ARRAYSIZE_H_