Do FilteringNetworkManager::CheckPermission from new Initialize method.

content/renderer/p2p/port_allocator.h

 // Copyright (c) 2012 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_RENDERER_P2P_PORT_ALLOCATOR_H_
 #define CONTENT_RENDERER_P2P_PORT_ALLOCATOR_H_
 
 #include <memory>
 
 #include "base/macros.h"
@@ skipping 27 matching lines @@
     bool enable_default_local_candidate = true;
   };
 
   P2PPortAllocator(const scoped_refptr<P2PSocketDispatcher>& socket_dispatcher,
                    std::unique_ptr<rtc::NetworkManager> network_manager,
                    rtc::PacketSocketFactory* socket_factory,
                    const Config& config,
                    const GURL& origin);
   ~P2PPortAllocator() override;
 
+  // Will also initialize the network manager passed into the constructor.
+  void Initialize() override;
+
  private:
   std::unique_ptr<rtc::NetworkManager> network_manager_;
   scoped_refptr<P2PSocketDispatcher> socket_dispatcher_;
   Config config_;
   GURL origin_;
 
   DISALLOW_COPY_AND_ASSIGN(P2PPortAllocator);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_P2P_PORT_ALLOCATOR_H_