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/crypto/p256_key_exchange_test.cc b/quic/core/crypto/p256_key_exchange_test.cc
index 694fb62..5e81be4 100644
--- a/quic/core/crypto/p256_key_exchange_test.cc
+++ b/quic/core/crypto/p256_key_exchange_test.cc
@@ -6,8 +6,8 @@
 
 #include <memory>
 #include <string>
+#include <utility>
 
-#include "net/third_party/quiche/src/quic/platform/api/quic_ptr_util.h"
 #include "net/third_party/quiche/src/quic/platform/api/quic_test.h"
 
 namespace quic {