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

net/socket/socks_client_socket_pool_unittest.cc

 // Copyright (c) 2010 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.
 
 #include "net/socket/socks_client_socket_pool.h"
 
 #include <vector>
 
 #include "base/callback.h"
 #include "base/compiler_specific.h"
@@ skipping 88 matching lines @@
   virtual int RequestSocket(const std::string& group_name,
                             const void* socket_params,
                             RequestPriority priority,
                             ClientSocketHandle* handle,
                             CompletionCallback* callback,
                             const BoundNetLog& net_log) {
     ClientSocket* socket = client_socket_factory_->CreateTCPClientSocket(
         AddressList(), net_log.net_log());
     MockConnectJob* job = new MockConnectJob(socket, handle, callback);
     job_list_.push_back(job);
+    handle->set_pool_id(1);
     return job->Connect();
   }
 
   virtual void CancelRequest(const std::string& group_name,
                              const ClientSocketHandle* handle) {
     std::vector<MockConnectJob*>::iterator i;
     for (i = job_list_.begin(); i != job_list_.end(); ++i) {
       if ((*i)->CancelHandle(handle)) {
         cancel_count_++;
         break;
       }
     }
   }
 
   virtual void ReleaseSocket(const std::string& group_name,
-                             ClientSocket* socket) {
+                             ClientSocket* socket,
+                             int id) {
+    EXPECT_EQ(1, id);
     release_count_++;
     delete socket;
   }
 
  protected:
   virtual ~MockTCPClientSocketPool() {}
 
  private:
   ClientSocketFactory* client_socket_factory_;
   int release_count_;
@@ skipping 234 matching lines @@
 
   requests_[0]->handle()->Reset();
   requests_[1]->handle()->Reset();
 }
 
 // It would be nice to also test the timeouts in SOCKSClientSocketPool.
 
 }  // namespace
 
 }  // namespace net