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 RTCStats : public blink::WebRTCStats {
+ public:
+  RTCStats(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;
+  // The member is valid as long as this |RTCStats| object is alive. Do not use
+  // the member object after this object is destroyed.
+  std::unique_ptr<blink::WebRTCStatsMember> getMember(size_t i) const override;
+
+ private:
+  // |stats_| are owned by |stats_owner_|, keeping a reference to the owning
+  // report protects it from destruction.
+  scoped_refptr<const webrtc::RTCStatsReport> stats_owner_;
+  const webrtc::RTCStats* stats_;
+  // Members of |stats_|, same as |stats_->Members()|.
+  std::vector<const webrtc::RTCStatsMemberInterface*> members_;
+};
+
+class RTCStatsMember : public blink::WebRTCStatsMember {
+ public:
+  RTCStatsMember(const webrtc::RTCStatsMemberInterface* member);
+
+  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;
+  const char* valueStaticString() const override;
+  const std::string& valueString() const override;
+  const std::vector<int32_t>& valueSequenceInt32() const override;
+  const std::vector<uint32_t>& valueSequenceUint32() const override;
+  const std::vector<int64_t>& valueSequenceInt64() const override;
+  const std::vector<uint64_t>& valueSequenceUint64() const override;
+  const std::vector<double>& valueSequenceDouble() const override;
+  const std::vector<const char*>& valueSequenceStaticString() const override;
+  const std::vector<std::string>& valueSequenceString() const override;
+
+ private:
+  // Owned by the stats whose member this is. Not to be used after the
+  // |RTCStats| that constructed this object is destroyed.
+  const webrtc::RTCStatsMemberInterface* member_;
+};
+
+}  // namespace content
+
+#endif  // CONTENT_RENDERER_MEDIA_WEBRTC_RTC_STATS_H_