Fix crash on IP address change.

net/socket/client_socket_pool_base.h

Index: net/socket/client_socket_pool_base.h
diff --git a/net/socket/client_socket_pool_base.h b/net/socket/client_socket_pool_base.h
index 75572cffd9cdb688abf769ce3632ecd311033423..d1abd5826339de3ca504400188b77fcf7ec6dce7 100644
--- a/net/socket/client_socket_pool_base.h
+++ b/net/socket/client_socket_pool_base.h
@@ -39,6 +39,7 @@
 #include "net/base/load_states.h"
 #include "net/base/net_errors.h"
 #include "net/base/net_log.h"
+#include "net/base/network_change_notifier.h"
 #include "net/base/request_priority.h"
 #include "net/socket/client_socket.h"
 #include "net/socket/client_socket_pool.h"
@@ -121,7 +122,8 @@ namespace internal {
 // ClientSocketPoolBase instead.
 class ClientSocketPoolBaseHelper
     : public base::RefCounted<ClientSocketPoolBaseHelper>,
-      public ConnectJob::Delegate {
+      public ConnectJob::Delegate,
+      public NetworkChangeNotifier::Observer {
  public:
   class Request {
    public:
@@ -168,7 +170,8 @@ class ClientSocketPoolBaseHelper
       int max_sockets_per_group,
       base::TimeDelta unused_idle_socket_timeout,
       base::TimeDelta used_idle_socket_timeout,
-      ConnectJobFactory* connect_job_factory);
+      ConnectJobFactory* connect_job_factory,
+      NetworkChangeNotifier* network_change_notifier);
 
   // See ClientSocketPool::RequestSocket for documentation on this function.
   // Note that |request| must be heap allocated.  If ERR_IO_PENDING is returned,
@@ -208,6 +211,9 @@ class ClientSocketPoolBaseHelper
   // ConnectJob::Delegate methods:
   virtual void OnConnectJobComplete(int result, ConnectJob* job);
 
+  // NetworkChangeNotifier::Observer methods:
+  virtual void OnIPAddressChanged();
+
   // For testing.
   bool may_have_stalled_group() const { return may_have_stalled_group_; }
 
@@ -428,6 +434,8 @@ class ClientSocketPoolBaseHelper
 
   const scoped_ptr<ConnectJobFactory> connect_job_factory_;
 
+  NetworkChangeNotifier* const network_change_notifier_;
+
   // TODO(vandebo) Remove when backup jobs move to TCPClientSocketPool
   bool backup_jobs_enabled_;
 
@@ -494,12 +502,14 @@ class ClientSocketPoolBase {
       const std::string& name,
       base::TimeDelta unused_idle_socket_timeout,
       base::TimeDelta used_idle_socket_timeout,
-      ConnectJobFactory* connect_job_factory)
+      ConnectJobFactory* connect_job_factory,
+      NetworkChangeNotifier* network_change_notifier)
       : name_(name),
         helper_(new internal::ClientSocketPoolBaseHelper(
           max_sockets, max_sockets_per_group,
           unused_idle_socket_timeout, used_idle_socket_timeout,
-          new ConnectJobFactoryAdaptor(connect_job_factory))) {}
+          new ConnectJobFactoryAdaptor(connect_job_factory),
+          network_change_notifier)) {}
 
   virtual ~ClientSocketPoolBase() {}