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

quic/core/quic_dispatcher_test.cc

diff --git a/quic/core/quic_dispatcher_test.cc b/quic/core/quic_dispatcher_test.cc
index abae0f2..3240ceb 100644
--- a/quic/core/quic_dispatcher_test.cc
+++ b/quic/core/quic_dispatcher_test.cc
@@ -7,6 +7,7 @@
 #include <memory>
 #include <ostream>
 #include <string>
+#include <utility>
 
 #include "net/third_party/quiche/src/quic/core/chlo_extractor.h"
 #include "net/third_party/quiche/src/quic/core/crypto/crypto_handshake.h"