WebRTCStats added for surfacing RTCStats from WebRTC to Blink.

content/renderer/media/webrtc/rtc_stats.h

+// Copyright (c) 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 CONTENT_RENDERER_MEDIA_WEBRTC_RTC_STATS_H_
+#define CONTENT_RENDERER_MEDIA_WEBRTC_RTC_STATS_H_
+
+#include "base/memory/ref_counted.h"
+#include "third_party/WebKit/public/platform/WebRTCStats.h"
+#include "third_party/webrtc/api/rtcstats.h"
+#include "third_party/webrtc/api/rtcstatsreport.h"
+
+namespace content {
+
+class RTCStatsReport : public blink::WebRTCStatsReport {
+ public:
+  RTCStatsReport(
+      const scoped_refptr<const webrtc::RTCStatsReport>& stats_report);
+  ~RTCStatsReport() override;
+
+  std::unique_ptr<blink::WebRTCStats> next() override;
+
+ private:
+  const scoped_refptr<const webrtc::RTCStatsReport> stats_report_;
+  webrtc::RTCStatsReport::ConstIterator it_;
+  const webrtc::RTCStatsReport::ConstIterator end_;
+};
+
+class RTCStats : public blink::WebRTCStats {
+ public:
+  RTCStats(const scoped_refptr<const webrtc::RTCStatsReport>& stats_owner,
+           const webrtc::RTCStats* stats);
+  ~RTCStats() override;
+
+  blink::WebString id() const override;
+  blink::WebString type() const override;
+  double timestamp() const override;
+
+  size_t membersCount() const override;
+  std::unique_ptr<blink::WebRTCStatsMember> getMember(size_t i) const override;
+
+ private:
+  // Referencing the owning report protects |stats_| from destruction.

[perkj_chrome, 2016/09/09 07:10:40]

owning report protects ? 

[hbos_chromium, 2016/09/09 08:47:33]

Done.

+  const scoped_refptr<const webrtc::RTCStatsReport> stats_owner_;
+  // Pointer to a stats object that is owned by |stats_owner_|.
+  const webrtc::RTCStats* const stats_;
+  const std::vector<const webrtc::RTCStatsMemberInterface*> stats_members_;

[perkj_chrome, 2016/09/09 07:10:40]

and a comment about stats_members_? 

[hbos_chromium, 2016/09/09 08:47:33]

Done.

+};
+
+class RTCStatsMember : public blink::WebRTCStatsMember {
+ public:
+  RTCStatsMember(const scoped_refptr<const webrtc::RTCStatsReport>& stats_owner,
+                 const webrtc::RTCStatsMemberInterface* member);
+  ~RTCStatsMember() override;
+
+  blink::WebString name() const override;
+  blink::WebRTCStatsMemberType type() const override;
+
+  int32_t valueInt32() const override;
+  uint32_t valueUint32() const override;
+  int64_t valueInt64() const override;
+  uint64_t valueUint64() const override;
+  double valueDouble() const override;
+  blink::WebString valueString() const override;
+  blink::WebVector<int32_t> valueSequenceInt32() const override;
+  blink::WebVector<uint32_t> valueSequenceUint32() const override;
+  blink::WebVector<int64_t> valueSequenceInt64() const override;
+  blink::WebVector<uint64_t> valueSequenceUint64() const override;
+  blink::WebVector<double> valueSequenceDouble() const override;
+  blink::WebVector<blink::WebString> valueSequenceString() const override;
+
+ private:
+  // Referencing the owning report protects |member_| from destruction.

[perkj_chrome, 2016/09/09 07:10:40]

dito

[hbos_chromium, 2016/09/09 08:47:33]

Done.

+  const scoped_refptr<const webrtc::RTCStatsReport> stats_owner_;
+  // Pointer to member of a stats object that is owned by |stats_owner_|.
+  const webrtc::RTCStatsMemberInterface* const member_;
+};
+
+}  // namespace content
+
+#endif  // CONTENT_RENDERER_MEDIA_WEBRTC_RTC_STATS_H_