Remove usages of QuicMakeUnique, Http2MakeUnique, SpdyMakeUnique.

This is made possible by all embedders finally supporting C++14's
std::make_unique, which is already used in more than 100 files in quic/.

gfe-relnote: n/a, no functional change.
PiperOrigin-RevId: 273935577
Change-Id: Icd6dd234422f286d897ea13ae609a67310f96380
diff --git a/quic/core/quic_packet_creator_test.cc b/quic/core/quic_packet_creator_test.cc
index 075b5b4..a647994 100644
--- a/quic/core/quic_packet_creator_test.cc
+++ b/quic/core/quic_packet_creator_test.cc
@@ -8,6 +8,7 @@
 #include <memory>
 #include <ostream>
 #include <string>
+#include <utility>
 
 #include "net/third_party/quiche/src/quic/core/crypto/null_decrypter.h"
 #include "net/third_party/quiche/src/quic/core/crypto/null_encrypter.h"