Move RtcEventLog object from inside VoiceEngine to Call.

webrtc/modules/bitrate_controller/bitrate_controller_impl.h

Index: webrtc/modules/bitrate_controller/bitrate_controller_impl.h
diff --git a/webrtc/modules/bitrate_controller/bitrate_controller_impl.h b/webrtc/modules/bitrate_controller/bitrate_controller_impl.h
index 6f776d758b491a760bc29c261123ffd56b410633..7207b9ac18a7ed3a8a7df40f69d1b7e616acce95 100644
--- a/webrtc/modules/bitrate_controller/bitrate_controller_impl.h
+++ b/webrtc/modules/bitrate_controller/bitrate_controller_impl.h
@@ -27,7 +27,9 @@ namespace webrtc {
 
 class BitrateControllerImpl : public BitrateController {
  public:
-  BitrateControllerImpl(Clock* clock, BitrateObserver* observer);
+  BitrateControllerImpl(Clock* clock,
+                        BitrateObserver* observer,
+                        RtcEventLog* event_log);
   virtual ~BitrateControllerImpl() {}
 
   bool AvailableBandwidth(uint32_t* bandwidth) const override;
@@ -41,8 +43,6 @@ class BitrateControllerImpl : public BitrateController {
 
   void SetReservedBitrate(uint32_t reserved_bitrate_bps) override;
 
-  void SetEventLog(RtcEventLog* event_log) override;
-
   int64_t TimeUntilNextProcess() override;
   void Process() override;