Add quic_logging

net/quic/platform/api/quic_logging.h

+// Copyright (c) 2017 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 NET_QUIC_PLATFORM_API_QUIC_LOGGING_H_
+#define NET_QUIC_PLATFORM_API_QUIC_LOGGING_H_
+
+#include "net/quic/platform/impl/quic_logging_impl.h"
+
+// Please note following QUIC_LOG are platform dependent:
+// INFO severity can be degraded (to VLOG(1) or DVLOG(1)).
+// Some platforms may not support QUIC_LOG_FIRST_N or QUIC_LOG_EVERY_N_SEC, and
+// they would simply be translated to LOG.
+
+#define QUIC_DVLOG(verbose_level) QUIC_DVLOG_IMPL(verbose_level)
+#define QUIC_DLOG(severity) QUIC_DLOG_IMPL(severity)
+#define QUIC_LOG(severity) QUIC_LOG_IMPL(severity)
+#define QUIC_LOG_FIRST_N(severity, n) QUIC_LOG_FIRST_N_IMPL(severity, n)
+#define QUIC_LOG_EVERY_N_SEC(severity, seconds) \
+  QUIC_LOG_EVERY_N_SEC_IMPL(severity, seconds)
+#define QUIC_LOG_IF(severity, condition) QUIC_LOG_IF_IMPL(severity, condition)
+
+#endif  // NET_QUIC_PLATFORM_API_QUIC_LOGGING_H_