Do not attempt to reuse active sockets after a socket pool flush (usually a network change).

net/socket/client_socket_handle.h

Index: net/socket/client_socket_handle.h
diff --git a/net/socket/client_socket_handle.h b/net/socket/client_socket_handle.h
index 4b36e5893dd0e0f98093788850897bf365a95aef..13095ab54207cf4f2192406082d9832dd4fda9ec 100644
--- a/net/socket/client_socket_handle.h
+++ b/net/socket/client_socket_handle.h
@@ -93,6 +93,7 @@ class ClientSocketHandle {
   void set_is_reused(bool is_reused) { is_reused_ = is_reused; }
   void set_socket(ClientSocket* s) { socket_.reset(s); }
   void set_idle_time(base::TimeDelta idle_time) { idle_time_ = idle_time; }
+  void set_pool_id(int id) { pool_id_ = id; }
 
   // These may only be used if is_initialized() is true.
   const std::string& group_name() const { return group_name_; }
@@ -142,6 +143,7 @@ class ClientSocketHandle {
   CompletionCallbackImpl<ClientSocketHandle> callback_;
   CompletionCallback* user_callback_;
   base::TimeDelta idle_time_;
+  int pool_id_;  // See ClientSocketPool::ReleaseSocket() for an explanation.
   base::TimeTicks init_time_;
   base::TimeDelta setup_time_;