Add QUIC_EXPORT macros

net/quic/core/frames/quic_padding_frame.h

Index: net/quic/core/frames/quic_padding_frame.h
diff --git a/net/quic/core/frames/quic_padding_frame.h b/net/quic/core/frames/quic_padding_frame.h
index bca7118954806d284457a0184547b4de206b163f..93fb990c451570b9d9ba6418ee8b116de20dd758 100644
--- a/net/quic/core/frames/quic_padding_frame.h
+++ b/net/quic/core/frames/quic_padding_frame.h
@@ -8,18 +8,19 @@
 #include <cstdint>
 #include <ostream>
 
-#include "net/base/net_export.h"
+#include "net/quic/platform/api/quic_export.h"
 
 namespace net {
 
 // A padding frame contains no payload.
-struct NET_EXPORT_PRIVATE QuicPaddingFrame {
+struct QUIC_EXPORT_PRIVATE QuicPaddingFrame {
   QuicPaddingFrame() : num_padding_bytes(-1) {}
   explicit QuicPaddingFrame(int num_padding_bytes)
       : num_padding_bytes(num_padding_bytes) {}
 
-  friend NET_EXPORT_PRIVATE std::ostream& operator<<(std::ostream& os,
-                                                     const QuicPaddingFrame& s);
+  friend QUIC_EXPORT_PRIVATE std::ostream& operator<<(
+      std::ostream& os,
+      const QuicPaddingFrame& s);
 
   // -1: full padding to the end of a max-sized packet
   // otherwise: only pad up to num_padding_bytes bytes