Set Token-Binding HTTP header

net/socket/ssl_client_socket_openssl.h

Index: net/socket/ssl_client_socket_openssl.h
diff --git a/net/socket/ssl_client_socket_openssl.h b/net/socket/ssl_client_socket_openssl.h
index 9acb728f961b498a06236f0f2af1c8f9fba127af..2d8ebe165f979467c7f4f64d8d81e49e696877e8 100644
--- a/net/socket/ssl_client_socket_openssl.h
+++ b/net/socket/ssl_client_socket_openssl.h
@@ -13,6 +13,7 @@
 #include <vector>
 
 #include "base/compiler_specific.h"
+#include "base/containers/mru_cache.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "net/base/completion_callback.h"
@@ -36,6 +37,8 @@ class SSLCertRequestInfo;
 class SSLInfo;
 class SSLPrivateKey;
 
+typedef base::MRUCache<std::string, std::vector<uint8_t>> SignedEkmMap;
+
 // An SSL client socket implemented with OpenSSL.
 class SSLClientSocketOpenSSL : public SSLClientSocket {
  public:
@@ -61,6 +64,8 @@ class SSLClientSocketOpenSSL : public SSLClientSocket {
   void GetSSLCertRequestInfo(SSLCertRequestInfo* cert_request_info) override;
   NextProtoStatus GetNextProto(std::string* proto) const override;
   ChannelIDService* GetChannelIDService() const override;
+  int GetSignedEKMForTokenBinding(crypto::ECPrivateKey* key,
+                                  std::vector<uint8_t>* out) override;
   SSLFailureState GetSSLFailureState() const override;
 
   // SSLSocket implementation.
@@ -290,6 +295,7 @@ class SSLClientSocketOpenSSL : public SSLClientSocket {
   ChannelIDService* channel_id_service_;
   bool tb_was_negotiated_;
   TokenBindingParam tb_negotiated_param_;
+  SignedEkmMap tb_signed_ekm_map_;
 
   // OpenSSL stuff
   SSL* ssl_;