Fix crash on IP address change.

net/http/http_network_session.cc

Index: net/http/http_network_session.cc
diff --git a/net/http/http_network_session.cc b/net/http/http_network_session.cc
index ea8d1d7c9422f2e5af92dbaac5a1b2b58adfddb8..146223b606ccef3c3064a63b0c984150f133af59 100644
--- a/net/http/http_network_session.cc
+++ b/net/http/http_network_session.cc
@@ -29,68 +29,49 @@ HttpNetworkSession::HttpNetworkSession(
     ProxyService* proxy_service,
     ClientSocketFactory* client_socket_factory,
     SSLConfigService* ssl_config_service,
+    SpdySessionPool* spdy_session_pool,
     HttpAuthHandlerFactory* http_auth_handler_factory)
     : network_change_notifier_(network_change_notifier),
+      tcp_socket_pool_(new TCPClientSocketPool(
+          max_sockets_, max_sockets_per_group_, "Transport",
+          host_resolver, client_socket_factory, network_change_notifier_)),
+      socks_socket_pool_(new SOCKSClientSocketPool(
+          max_sockets_, max_sockets_per_group_, "SOCKS", host_resolver,
+          new TCPClientSocketPool(max_sockets_, max_sockets_per_group_,
+                                  "TCPForSOCKS", host_resolver,
+                                  client_socket_factory,
+                                  network_change_notifier_),
+          network_change_notifier_)),
       socket_factory_(client_socket_factory),
       host_resolver_(host_resolver),
-      tcp_socket_pool_(CreateNewTCPSocketPool()),
-      socks_socket_pool_(CreateNewSOCKSSocketPool()),
       proxy_service_(proxy_service),
       ssl_config_service_(ssl_config_service),
-      spdy_session_pool_(new SpdySessionPool()),
+      spdy_session_pool_(spdy_session_pool),
       http_auth_handler_factory_(http_auth_handler_factory) {
   DCHECK(proxy_service);
   DCHECK(ssl_config_service);
-
-  if (network_change_notifier)
-    network_change_notifier_->AddObserver(this);
 }
 
 HttpNetworkSession::~HttpNetworkSession() {
-  if (network_change_notifier_)
-    network_change_notifier_->RemoveObserver(this);
 }
 
 // static
 void HttpNetworkSession::set_max_sockets_per_group(int socket_count) {
-  DCHECK_LT(0, socket_count);
+  DCHECK(0 < socket_count);
   // The following is a sanity check... but we should NEVER be near this value.
-  DCHECK_GT(100, socket_count);
+  DCHECK(100 > socket_count);
   max_sockets_per_group_ = socket_count;
 }
 
-void HttpNetworkSession::Flush() {
-  host_resolver()->Flush();
-  tcp_socket_pool()->CloseIdleSockets();
-  tcp_socket_pool_ = CreateNewTCPSocketPool();
-  socks_socket_pool()->CloseIdleSockets();
-  socks_socket_pool_ = CreateNewSOCKSSocketPool();
-  spdy_session_pool_->CloseAllSessions();
-  spdy_session_pool_ = new SpdySessionPool;
-}
-
-void HttpNetworkSession::OnIPAddressChanged() {
-  Flush();
-}
-
-scoped_refptr<TCPClientSocketPool>
-HttpNetworkSession::CreateNewTCPSocketPool() {
-  // TODO(vandebo) when we've completely converted to pools, the base TCP
-  // pool name should get changed to TCP instead of Transport.
-  return new TCPClientSocketPool(max_sockets_,
-                                 max_sockets_per_group_,
-                                 "Transport",
-                                 host_resolver_,
-                                 socket_factory_);
-}
-
-scoped_refptr<SOCKSClientSocketPool>
-HttpNetworkSession::CreateNewSOCKSSocketPool() {
-  return new SOCKSClientSocketPool(
-      max_sockets_, max_sockets_per_group_, "SOCKS", host_resolver_,
-      new TCPClientSocketPool(max_sockets_, max_sockets_per_group_,
-                              "TCPForSOCKS", host_resolver_,
-                              socket_factory_));
+// TODO(vandebo) when we've completely converted to pools, the base TCP
+// pool name should get changed to TCP instead of Transport.
+void HttpNetworkSession::ReplaceTCPSocketPool() {
+  tcp_socket_pool_ = new TCPClientSocketPool(max_sockets_,
+                                             max_sockets_per_group_,
+                                             "Transport",
+                                             host_resolver_,
+                                             socket_factory_,
+                                             network_change_notifier_);
 }
 
 }  //  namespace net