core: use EventEmitter from ndn-cxx
Deleting EventEmitter in core/.
refs #2117
Change-Id: Ieab631c0b3101e313a0af44af7085bcf090596b0
diff --git a/common.hpp b/common.hpp
index 0271006..b77604e 100644
--- a/common.hpp
+++ b/common.hpp
@@ -49,6 +49,7 @@
#include <ndn-cxx/common.hpp>
#include <ndn-cxx/interest.hpp>
#include <ndn-cxx/data.hpp>
+#include <ndn-cxx/util/event-emitter.hpp>
#include <boost/algorithm/string.hpp>
#include <boost/asio.hpp>
@@ -86,6 +87,7 @@
using ndn::Name;
using ndn::Exclude;
using ndn::Block;
+using ndn::util::EventEmitter;
namespace tlv {
// Don't write "namespace tlv = ndn::tlv", because NFD can add other members into this namespace.