Fix crash in P2P IPC host.

content/browser/renderer_host/p2p_sockets_host.h

 // 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.
 
 #ifndef CONTENT_BROWSER_RENDERER_HOST_P2P_SOCKETS_HOST_H_
 #define CONTENT_BROWSER_RENDERER_HOST_P2P_SOCKETS_HOST_H_
 
 #include "base/id_map.h"
 #include "content/browser/browser_message_filter.h"
 #include "content/common/p2p_sockets.h"
@@ skipping 12 matching lines @@
                                  bool* message_was_ok);
 
  private:
   void OnCreateSocket(const IPC::Message& msg, P2PSocketType type,
                       int socket_id, P2PSocketAddress remote_address);
   void OnSend(const IPC::Message& msg, int socket_id,
               P2PSocketAddress socket_address,
               const std::vector<char>& data);
   void OnDestroySocket(const IPC::Message& msg, int socket_id);
 
-  IDMap<P2PSocketHost> sockets_;
+  IDMap<P2PSocketHost, IDMapOwnPointer> sockets_;
 
   DISALLOW_COPY_AND_ASSIGN(P2PSocketsHost);
 };
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_P2P_SOCKETS_HOST_H_