Refactoring: move ownership of RtcEventLog from Call to PeerConnection

webrtc/call/rtc_event_log.h

Index: webrtc/call/rtc_event_log.h
diff --git a/webrtc/call/rtc_event_log.h b/webrtc/call/rtc_event_log.h
index a3359692eb8488dd2796929aaa278476156ee563..bea57b01cd11eb4729b83f1967cb6258862ac7c2 100644
--- a/webrtc/call/rtc_event_log.h
+++ b/webrtc/call/rtc_event_log.h
@@ -40,9 +40,6 @@ class RtcEventLog {
   // Factory method to create an RtcEventLog object.
   static std::unique_ptr<RtcEventLog> Create(const Clock* clock);
 
-  // Create an RtcEventLog object that does nothing.
-  static std::unique_ptr<RtcEventLog> CreateNull();
-
   // Starts logging a maximum of max_size_bytes bytes to the specified file.
   // If the file already exists it will be overwritten.
   // If max_size_bytes <= 0, logging will be active until StopLogging is called.
@@ -109,34 +106,6 @@ class RtcEventLog {
                                rtclog::EventStream* result);
 };
 
-// No-op implementation is used if flag is not set, or in tests.
-class RtcEventLogNullImpl final : public RtcEventLog {
- public:
-  bool StartLogging(const std::string& file_name,
-                    int64_t max_size_bytes) override {
-    return false;
-  }
-  bool StartLogging(rtc::PlatformFile platform_file,
-                    int64_t max_size_bytes) override;
-  void StopLogging() override {}
-  void LogVideoReceiveStreamConfig(
-      const VideoReceiveStream::Config& config) override {}
-  void LogVideoSendStreamConfig(
-      const VideoSendStream::Config& config) override {}
-  void LogRtpHeader(PacketDirection direction,
-                    MediaType media_type,
-                    const uint8_t* header,
-                    size_t packet_length) override {}
-  void LogRtcpPacket(PacketDirection direction,
-                     MediaType media_type,
-                     const uint8_t* packet,
-                     size_t length) override {}
-  void LogAudioPlayout(uint32_t ssrc) override {}
-  void LogBwePacketLossEvent(int32_t bitrate,
-                             uint8_t fraction_loss,
-                             int32_t total_packets) override {}
-};
-
 }  // namespace webrtc
 
 #endif  // WEBRTC_CALL_RTC_EVENT_LOG_H_