Move RtcEventLog object from inside VoiceEngine to Call.

webrtc/media/engine/fakewebrtccall.h

Index: webrtc/media/engine/fakewebrtccall.h
diff --git a/webrtc/media/engine/fakewebrtccall.h b/webrtc/media/engine/fakewebrtccall.h
index cf96cc53f6bc260afbbab52e2ec523bd7ed6c964..30d0f254728f9033be047ea269c0afc6fe800f73 100644
--- a/webrtc/media/engine/fakewebrtccall.h
+++ b/webrtc/media/engine/fakewebrtccall.h
@@ -238,6 +238,10 @@ class FakeCall final : public webrtc::Call, public webrtc::PacketReceiver {
   void SignalNetworkState(webrtc::NetworkState state) override;
   void OnSentPacket(const rtc::SentPacket& sent_packet) override;
 
+  bool StartEventLog(rtc::PlatformFile log_file,
+                     int64_t max_size_bytes) override;
+  void StopEventLog() override;
+
   webrtc::Call::Config config_;
   webrtc::NetworkState network_state_;
   rtc::SentPacket last_sent_packet_;