RTCStatsCollector and RTCPeerConnectionStats added

webrtc/stats/rtcstats_objects.cc

+/*
+ *  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.
+ */
+
+#include "webrtc/api/rtcstats_objects.h"
+
+namespace webrtc {
+
+const char RTCPeerConnectionStats::kType[] = "peer-connection";
+
+RTCPeerConnectionStats::RTCPeerConnectionStats(
+    const std::string& id, double timestamp)
+    : RTCPeerConnectionStats(std::string(id), timestamp) {
+}
+
+RTCPeerConnectionStats::RTCPeerConnectionStats(
+    std::string&& id, double timestamp)
+    : RTCStats(std::move(id), timestamp),
+      data_channels_opened("dataChannelsOpened"),
+      data_channels_closed("dataChannelsClosed") {
+}
+
+}  // namespace webrtc