Allow server sockets to rebind to same port if there is nothing actively listening on that port.

content/browser/renderer_host/p2p/socket_host_tcp_server_unittest.cc

 // Copyright (c) 2011 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 "content/browser/renderer_host/p2p/socket_host_tcp_server.h"
 
 #include "content/browser/renderer_host/p2p/socket_host_tcp.h"
 #include "content/browser/renderer_host/p2p/socket_host_test_utils.h"
 #include "net/base/completion_callback.h"
 #include "testing/gmock/include/gmock/gmock.h"
@@ skipping 28 matching lines @@
       // callback.
       net::CompletionCallback cb = accept_callback_;
       accept_callback_.Reset();
       cb.Run(net::OK);
     } else {
       incoming_sockets_.push_back(socket);
     }
   }
 
   // net::ServerSocket implementation.
+  virtual void AllowAddressReuse() {
+  }
+
   virtual int Listen(const net::IPEndPoint& address, int backlog) OVERRIDE {
     local_address_ = address;
     listening_ = true;
     return net::OK;
   }
 
   virtual int GetLocalAddress(net::IPEndPoint* address) const OVERRIDE {
     *address = local_address_;
     return net::OK;
   }
@@ skipping 101 matching lines @@
   EXPECT_EQ(incoming1, GetSocketFormTcpSocketHost(
       reinterpret_cast<P2PSocketHostTcp*>(new_host1.get())));
   scoped_ptr<P2PSocketHost> new_host2(
       socket_host_->AcceptIncomingTcpConnection(addr2, kAcceptedSocketId2));
   ASSERT_TRUE(new_host2.get() != NULL);
   EXPECT_EQ(incoming2, GetSocketFormTcpSocketHost(
       reinterpret_cast<P2PSocketHostTcp*>(new_host2.get())));
 }
 
 }  // namespace content