RTCStatsCollector and RTCPeerConnectionStats added

webrtc/api/rtcstats_objects.h

+/*
+ *  Copyright 2016 The WebRTC Project Authors. All rights reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef WEBRTC_API_RTCSTATS_OBJECTS_H_
+#define WEBRTC_API_RTCSTATS_OBJECTS_H_
+
+#include <string>
+
+#include "webrtc/api/rtcstats.h"
+
+namespace webrtc {
+
+class RTCPeerConnectionStats : public RTCStats {
+ public:
+  RTCPeerConnectionStats(const std::string& id, double timestamp);
+  RTCPeerConnectionStats(std::string&& id, double timestamp);
+
+  WEBRTC_RTCSTATS_IMPL(RTCStats, RTCPeerConnectionStats,
+      &data_channels_opened,
+      &data_channels_closed);
+
+  RTCStatsMember<uint32_t> data_channels_opened;
+  RTCStatsMember<uint32_t> data_channels_closed;
+};
+
+}  // namespace webrtc
+
+#endif  // WEBRTC_API_RTCSTATS_OBJECTS_H_