Add BWE plot to event log analyzer.

webrtc/call/rtc_event_log.cc

Index: webrtc/call/rtc_event_log.cc
diff --git a/webrtc/call/rtc_event_log.cc b/webrtc/call/rtc_event_log.cc
index 840b210d15378dbbdf1ee079886674fe6064d27b..7627d3784bb8630da8d55a48fd6a1f7e159a0b19 100644
--- a/webrtc/call/rtc_event_log.cc
+++ b/webrtc/call/rtc_event_log.cc
@@ -38,40 +38,6 @@
 
 namespace webrtc {
 
-// 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 {
-    // The platform_file is open and needs to be closed.
-    if (!rtc::ClosePlatformFile(platform_file)) {
-      LOG(LS_ERROR) << "Can't close file.";
-    }
-    return false;
-  }
-  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 {}
-};
-
 #ifdef ENABLE_RTC_EVENT_LOG
 
 class RtcEventLogImpl final : public RtcEventLog {