Add support to QUIC for QUIC_VERSION_8: for RSA-PSS signatures, set

net/quic/crypto/proof_source.h

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef NET_QUIC_CRYPTO_PROOF_SOURCE_H_
 #define NET_QUIC_CRYPTO_PROOF_SOURCE_H_
 
 #include <string>
 #include <vector>
 
 #include "net/base/net_export.h"
+#include "net/quic/quic_protocol.h"
 
 namespace net {
 
 // ProofSource is an interface by which a QUIC server can obtain certificate
 // chains and signatures that prove its identity.
 class NET_EXPORT_PRIVATE ProofSource {
  public:
   virtual ~ProofSource() {}
 
   // GetProof finds a certificate chain for |hostname|, sets |out_certs| to
   // point to it (in leaf-first order), calculates a signature of
   // |server_config| using that chain and puts the result in |out_signature|.
   //
   // The signature uses SHA-256 as the hash function and PSS padding when the
   // key is RSA.
   //
   // The signature uses SHA-256 as the hash function when the key is ECDSA.
   //
+  // |version| is the QUIC version for the connection. TODO(wtc): Remove once
+  // QUIC_VERSION_7 and before are removed.
+  //
   // |out_certs| is a pointer to a pointer, not a pointer to an array.
   //
   // The number of certificate chains is expected to be small and fixed thus
   // the ProofSource retains ownership of the contents of |out_certs|. The
   // expectation is that they will be cached forever.
   //
   // The signature values should be cached because |server_config| will be
   // somewhat static. However, since they aren't bounded, the ProofSource may
   // wish to evicit entries from that cache, thus the caller takes ownership of
   // |*out_signature|.
   //
   // |hostname| may be empty to signify that a default certificate should be
   // used.
   //
   // This function may be called concurrently.
-  virtual bool GetProof(const std::string& hostname,
+  virtual bool GetProof(QuicVersion version,
+                        const std::string& hostname,
                         const std::string& server_config,
                         bool ecdsa_ok,
                         const std::vector<std::string>** out_certs,
                         std::string* out_signature) = 0;
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_CRYPTO_PROOF_SOURCE_H_