[Cronet] Pass metrics information from C++ BidirectionalStream to Java

components/cronet/android/metrics_util.h

+// Copyright 2016 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 COMPONENTS_CRONET_ANDROID_CRONET_METRICS_UTIL_H_
+#define COMPONENTS_CRONET_ANDROID_CRONET_METRICS_UTIL_H_
+
+#include <stdint.h>
+
+#include "base/time/time.h"
+
+namespace cronet {
+
+namespace metrics_util {
+
+// Converts timing metrics stored as TimeTicks into the format expected by the
+// Java layer: ms since Unix epoch, or -1 for null
+int64_t ConvertTime(const base::TimeTicks& ticks,
+                    const base::TimeTicks& start_ticks,
+                    const base::Time& start_time);
+}  // namespace metrics_util
+
+}  // namespace cronet
+
+#endif  // COMPONENTS_CRONET_ANDROID_CRONET_METRICS_UTIL_H_