Revert of Log created probe clusters to RtcEventLog.

webrtc/modules/pacing/paced_sender.h

Index: webrtc/modules/pacing/paced_sender.h
diff --git a/webrtc/modules/pacing/paced_sender.h b/webrtc/modules/pacing/paced_sender.h
index 320e62f076954615745cd6e98165e72b832dfb6b..e69c1d26b8c01d50efc3d4647d652a8c41079845 100644
--- a/webrtc/modules/pacing/paced_sender.h
+++ b/webrtc/modules/pacing/paced_sender.h
@@ -27,7 +27,6 @@
 class Clock;
 class CriticalSectionWrapper;
 class ProbeClusterCreatedObserver;
-class RtcEventLog;
 
 namespace paced_sender {
 class IntervalBudget;
@@ -69,9 +68,7 @@
   // overshoots from the encoder.
   static const float kDefaultPaceMultiplier;
 
-  PacedSender(const Clock* clock,
-              PacketSender* packet_sender,
-              RtcEventLog* event_log);
+  PacedSender(const Clock* clock, PacketSender* packet_sender);
 
   virtual ~PacedSender();