Implement SPDY_EXPORT and SPDY_EXPORT_PRIVATE macros.

net/spdy/core/hpack/hpack_decoder_interface.h

Index: net/spdy/core/hpack/hpack_decoder_interface.h
diff --git a/net/spdy/core/hpack/hpack_decoder_interface.h b/net/spdy/core/hpack/hpack_decoder_interface.h
index 828e799ac2e1750b7f76493b3e21af9262776a7c..490fa3f1291b052a44a93b963313009c0070e0f6 100644
--- a/net/spdy/core/hpack/hpack_decoder_interface.h
+++ b/net/spdy/core/hpack/hpack_decoder_interface.h
@@ -12,14 +12,14 @@
 
 #include <memory>
 
-#include "net/base/net_export.h"
 #include "net/spdy/core/hpack/hpack_header_table.h"
 #include "net/spdy/core/spdy_header_block.h"
 #include "net/spdy/core/spdy_headers_handler_interface.h"
+#include "net/spdy/platform/api/spdy_export.h"
 
 namespace net {
 
-class NET_EXPORT_PRIVATE HpackDecoderInterface {
+class SPDY_EXPORT_PRIVATE HpackDecoderInterface {
  public:
   virtual ~HpackDecoderInterface() {}