Move RtcEventLog object from inside VoiceEngine to Call.

webrtc/voice_engine/channel.h

Index: webrtc/voice_engine/channel.h
diff --git a/webrtc/voice_engine/channel.h b/webrtc/voice_engine/channel.h
index 07a0f789da8f22c907658f8e0ca838f8c7d975e5..8f77afe97df25db5e53e7b467a55c16598722acd 100644
--- a/webrtc/voice_engine/channel.h
+++ b/webrtc/voice_engine/channel.h
@@ -63,6 +63,7 @@ struct SenderInfo;
 namespace voe {
 
 class OutputMixer;
+class RtcEventLogProxy;
 class RtpPacketSenderProxy;
 class Statistics;
 class StatisticsProxy;
@@ -170,11 +171,9 @@ class Channel
   static int32_t CreateChannel(Channel*& channel,
                                int32_t channelId,
                                uint32_t instanceId,
-                               RtcEventLog* const event_log,
                                const Config& config);
   Channel(int32_t channelId,
           uint32_t instanceId,
-          RtcEventLog* const event_log,
           const Config& config);
   int32_t Init();
   int32_t SetEngineInformation(Statistics& engineStatistics,
@@ -434,6 +433,9 @@ class Channel
   // Disassociate a send channel if it was associated.
   void DisassociateSendChannel(int channel_id);
 
+  // Set a RtcEventLog logging object.
+  void SetRtcEventLog(RtcEventLog* event_log);
+
  protected:
   void OnIncomingFractionLoss(int fraction_lost);
 
@@ -470,7 +472,7 @@ class Channel
 
   ChannelState channel_state_;
 
-  RtcEventLog* const event_log_;
+  std::unique_ptr<voe::RtcEventLogProxy> event_log_proxy_;
 
   std::unique_ptr<RtpHeaderParser> rtp_header_parser_;
   std::unique_ptr<RTPPayloadRegistry> rtp_payload_registry_;