Gather metrics classifying the cause of the TLS fallback.

net/socket/ssl_client_socket_openssl.h

 // Copyright (c) 2012 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_SOCKET_SSL_CLIENT_SOCKET_OPENSSL_H_
 #define NET_SOCKET_SSL_CLIENT_SOCKET_OPENSSL_H_
 
 #include <string>
 
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "net/base/completion_callback.h"
 #include "net/base/io_buffer.h"
 #include "net/cert/cert_verifier.h"
 #include "net/cert/cert_verify_result.h"
 #include "net/cert/ct_verify_result.h"
 #include "net/socket/client_socket_handle.h"
 #include "net/socket/ssl_client_socket.h"
 #include "net/ssl/channel_id_service.h"
 #include "net/ssl/openssl_ssl_util.h"
 #include "net/ssl/ssl_client_cert_type.h"
 #include "net/ssl/ssl_config_service.h"
+#include "net/ssl/ssl_failure_state.h"
 
 // Avoid including misc OpenSSL headers, i.e.:
 // <openssl/bio.h>
 typedef struct bio_st BIO;
 // <openssl/evp.h>
 typedef struct evp_pkey_st EVP_PKEY;
 // <openssl/ssl.h>
 typedef struct ssl_st SSL;
 // <openssl/x509.h>
 typedef struct x509_st X509;
@@ skipping 22 matching lines @@
 
   const HostPortPair& host_and_port() const { return host_and_port_; }
   const std::string& ssl_session_cache_shard() const {
     return ssl_session_cache_shard_;
   }
 
   // SSLClientSocket implementation.
   void GetSSLCertRequestInfo(SSLCertRequestInfo* cert_request_info) override;
   NextProtoStatus GetNextProto(std::string* proto) const override;
   ChannelIDService* GetChannelIDService() const override;
+  SSLFailureState GetSSLFailureState() const override;
 
   // SSLSocket implementation.
   int ExportKeyingMaterial(const base::StringPiece& label,
                            bool has_context,
                            const base::StringPiece& context,
                            unsigned char* out,
                            unsigned int outlen) override;
   int GetTLSUniqueChannelBinding(std::string* out) override;
 
   // StreamSocket implementation.
@@ skipping 217 matching lines @@
   std::string channel_id_private_key_;
   std::string channel_id_cert_;
   // True if a channel ID was sent.
   bool channel_id_sent_;
   // True if the initial handshake has completed.
   bool handshake_completed_;
   // True if the initial handshake's certificate has been verified.
   bool certificate_verified_;
   // The request handle for |channel_id_service_|.
   ChannelIDService::RequestHandle channel_id_request_handle_;
+  SSLFailureState ssl_failure_state_;
 
   TransportSecurityState* transport_security_state_;
 
   CertPolicyEnforcer* const policy_enforcer_;
 
   // pinning_failure_log contains a message produced by
   // TransportSecurityState::CheckPublicKeyPins in the event of a
   // pinning failure. It is a (somewhat) human-readable string.
   std::string pinning_failure_log_;
 
   BoundNetLog net_log_;
   base::WeakPtrFactory<SSLClientSocketOpenSSL> weak_factory_;
 };
 
 }  // namespace net
 
 #endif  // NET_SOCKET_SSL_CLIENT_SOCKET_OPENSSL_H_