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

net/socket/client_socket_pool_base.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.
 //
 // A ClientSocketPoolBase is used to restrict the number of sockets open at
 // a time.  It also maintains a list of idle persistent sockets for reuse.
 // Subclasses of ClientSocketPool should compose ClientSocketPoolBase to handle
 // the core logic of (1) restricting the number of active (connected or
 // connecting) sockets per "group" (generally speaking, the hostname), (2)
 // maintaining a per-group list of idle, persistent sockets for reuse, and (3)
@@ skipping 185 matching lines @@
   };
 
   class ConnectJobFactory {
    public:
     ConnectJobFactory() {}
     virtual ~ConnectJobFactory() {}
 
     virtual scoped_ptr<ConnectJob> NewConnectJob(
         const std::string& group_name,
         const Request& request,
-        ConnectJob::Delegate* delegate) const = 0;
+        ConnectJob::Delegate* delegate) = 0;
 
     virtual base::TimeDelta ConnectionTimeout() const = 0;
 
    private:
     DISALLOW_COPY_AND_ASSIGN(ConnectJobFactory);
   };
 
   ClientSocketPoolBaseHelper(
       HigherLayeredPool* pool,
       int max_sockets,
@@ skipping 462 matching lines @@
   };
 
   class ConnectJobFactory {
    public:
     ConnectJobFactory() {}
     virtual ~ConnectJobFactory() {}
 
     virtual scoped_ptr<ConnectJob> NewConnectJob(
         const std::string& group_name,
         const Request& request,
-        ConnectJob::Delegate* delegate) const = 0;
+        ConnectJob::Delegate* delegate) = 0;
 
     virtual base::TimeDelta ConnectionTimeout() const = 0;
 
    private:
     DISALLOW_COPY_AND_ASSIGN(ConnectJobFactory);
   };
 
   // |max_sockets| is the maximum number of sockets to be maintained by this
   // ClientSocketPool.  |max_sockets_per_group| specifies the maximum number of
   // sockets a "group" can have.  |unused_idle_socket_timeout| specifies how
@@ skipping 149 matching lines @@
     typedef typename ClientSocketPoolBase<SocketParams>::ConnectJobFactory
         ConnectJobFactory;
 
     explicit ConnectJobFactoryAdaptor(ConnectJobFactory* connect_job_factory)
         : connect_job_factory_(connect_job_factory) {}
     virtual ~ConnectJobFactoryAdaptor() {}
 
     virtual scoped_ptr<ConnectJob> NewConnectJob(
         const std::string& group_name,
         const internal::ClientSocketPoolBaseHelper::Request& request,
-        ConnectJob::Delegate* delegate) const OVERRIDE {
+        ConnectJob::Delegate* delegate) OVERRIDE {
       const Request& casted_request = static_cast<const Request&>(request);
       return connect_job_factory_->NewConnectJob(
           group_name, casted_request, delegate);
     }
 
     virtual base::TimeDelta ConnectionTimeout() const {
       return connect_job_factory_->ConnectionTimeout();
     }
 
     const scoped_ptr<ConnectJobFactory> connect_job_factory_;
   };
 
   // Histograms for the pool
   ClientSocketPoolHistograms* const histograms_;
   internal::ClientSocketPoolBaseHelper helper_;
 
   DISALLOW_COPY_AND_ASSIGN(ClientSocketPoolBase);
 };
 
 }  // namespace net
 
 #endif  // NET_SOCKET_CLIENT_SOCKET_POOL_BASE_H_