Revert of Move RtcEventLog object from inside VoiceEngine to Call.

webrtc/modules/congestion_controller/include/congestion_controller.h

Index: webrtc/modules/congestion_controller/include/congestion_controller.h
diff --git a/webrtc/modules/congestion_controller/include/congestion_controller.h b/webrtc/modules/congestion_controller/include/congestion_controller.h
index a48f0008cc68683e211df5af769bc6ff3f2ce0eb..82906efc1d98d228bbddd13e37814315e7dcc137 100644
--- a/webrtc/modules/congestion_controller/include/congestion_controller.h
+++ b/webrtc/modules/congestion_controller/include/congestion_controller.h
@@ -29,11 +29,11 @@
 namespace webrtc {
 
 class BitrateController;
+class BitrateObserver;
 class Clock;
 class ProcessThread;
 class RemoteBitrateEstimator;
 class RemoteBitrateObserver;
-class RtcEventLog;
 class TransportFeedbackObserver;
 
 class CongestionController : public CallStatsObserver, public Module {
@@ -52,14 +52,17 @@
    protected:
     virtual ~Observer() {}
   };
+  // Deprecated
+  // TODO(perkj): Remove once no other clients use this ctor.
+  CongestionController(Clock* clock,
+                       BitrateObserver* bitrate_observer,
+                       RemoteBitrateObserver* remote_bitrate_observer);
+  CongestionController(Clock* clock,
+                       Observer* observer,
+                       RemoteBitrateObserver* remote_bitrate_observer);
   CongestionController(Clock* clock,
                        Observer* observer,
                        RemoteBitrateObserver* remote_bitrate_observer,
-                       RtcEventLog* event_log);
-  CongestionController(Clock* clock,
-                       Observer* observer,
-                       RemoteBitrateObserver* remote_bitrate_observer,
-                       RtcEventLog* event_log,
                        std::unique_ptr<PacketRouter> packet_router,
                        std::unique_ptr<PacedSender> pacer);
   virtual ~CongestionController();