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

net/quic/crypto/proof_verifier.h

Index: net/quic/crypto/proof_verifier.h
===================================================================
--- net/quic/crypto/proof_verifier.h	(revision 216255)
+++ net/quic/crypto/proof_verifier.h	(working copy)
@@ -10,6 +10,7 @@
 
 #include "net/base/completion_callback.h"
 #include "net/base/net_export.h"
+#include "net/quic/quic_protocol.h"
 
 namespace net {
 
@@ -70,7 +71,11 @@
   //
   // The signature uses SHA-256 as the hash function and PSS padding in the
   // case of RSA.
-  virtual Status VerifyProof(const std::string& hostname,
+  //
+  // |version| is the QUIC version for the connection. TODO(wtc): Remove once
+  // QUIC_VERSION_7 and before are removed.
+  virtual Status VerifyProof(QuicVersion version,
+                             const std::string& hostname,
                              const std::string& server_config,
                              const std::vector<std::string>& certs,
                              const std::string& signature,