This CL changes the lifespan of SSLConnectJobMessengers so that they are created only when needed,

net/socket/ssl_client_socket_nss.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_NSS_H_
 #define NET_SOCKET_SSL_CLIENT_SOCKET_NSS_H_
 
 #include <certt.h>
 #include <keyt.h>
 #include <nspr.h>
@@ skipping 50 matching lines @@
   // behaviour is desired, for performance or compatibility, the current task
   // runner should be supplied instead.
   SSLClientSocketNSS(base::SequencedTaskRunner* nss_task_runner,
                      scoped_ptr<ClientSocketHandle> transport_socket,
                      const HostPortPair& host_and_port,
                      const SSLConfig& ssl_config,
                      const SSLClientSocketContext& context);
   virtual ~SSLClientSocketNSS();
 
   // SSLClientSocket implementation.
+  virtual std::string GetSessionCacheKey() const OVERRIDE;
   virtual bool InSessionCache() const OVERRIDE;
   virtual void WatchSessionForCompletion(
       const base::Closure& callback) OVERRIDE;
   virtual void SetSocketFailureCallback(const base::Closure& callback) OVERRIDE;
   virtual void SetIsLeader() OVERRIDE;
   virtual void OnSocketFailure() OVERRIDE;
   virtual void GetSSLCertRequestInfo(
       SSLCertRequestInfo* cert_request_info) OVERRIDE;
   virtual NextProtoStatus GetNextProto(std::string* proto,
                                        std::string* server_protos) OVERRIDE;
@@ skipping 136 matching lines @@
   // Added the following code Debugging in release mode.
   mutable base::Lock lock_;
   // This is mutable so that CalledOnValidThread can set it.
   // It's guarded by |lock_|.
   mutable base::PlatformThreadId valid_thread_id_;
 };
 
 }  // namespace net
 
 #endif  // NET_SOCKET_SSL_CLIENT_SOCKET_NSS_H_