Add QUIC_EXPORT macros

net/quic/core/crypto/curve25519_key_exchange.h

Index: net/quic/core/crypto/curve25519_key_exchange.h
diff --git a/net/quic/core/crypto/curve25519_key_exchange.h b/net/quic/core/crypto/curve25519_key_exchange.h
index c9e33bb9428b7fe60d07f98628c9c60f3eb8e46d..ab79294c64cb45a6e77d764f7c37778ead6a897f 100644
--- a/net/quic/core/crypto/curve25519_key_exchange.h
+++ b/net/quic/core/crypto/curve25519_key_exchange.h
@@ -11,8 +11,8 @@
 
 #include "base/compiler_specific.h"
 #include "base/strings/string_piece.h"
-#include "net/base/net_export.h"
 #include "net/quic/core/crypto/key_exchange.h"
+#include "net/quic/platform/api/quic_export.h"
 
 namespace net {
 
@@ -20,7 +20,7 @@ class QuicRandom;
 
 // Curve25519KeyExchange implements a KeyExchange using elliptic-curve
 // Diffie-Hellman on curve25519. See http://cr.yp.to/ecdh.html
-class NET_EXPORT_PRIVATE Curve25519KeyExchange : public KeyExchange {
+class QUIC_EXPORT_PRIVATE Curve25519KeyExchange : public KeyExchange {
  public:
   ~Curve25519KeyExchange() override;