Add support for default local address in IpcNetworkManager

content/renderer/p2p/empty_network_manager.h

 // Copyright 2015 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_EMPTY_NETWORK_MANAGER_H_
 #define CONTENT_RENDERER_P2P_EMPTY_NETWORK_MANAGER_H_
 
 #include "base/memory/weak_ptr.h"
 #include "base/threading/thread_checker.h"
 #include "content/common/content_export.h"
 #include "third_party/webrtc/base/network.h"
 
+namespace rtc {
+class IPAddress;
+}  // namespace rtc
+
 namespace content {
 
 // A NetworkManager implementation which handles the case where local address
 // enumeration is not requested and just returns empty network lists. This class
 // is not thread safe and should only be used by WebRTC's worker thread.
 class EmptyNetworkManager : public rtc::NetworkManagerBase {
  public:
   // This class is created by WebRTC's signaling thread but used by WebRTC's
   // worker thread |task_runner|.
-  CONTENT_EXPORT EmptyNetworkManager();
+  CONTENT_EXPORT explicit EmptyNetworkManager(
+      rtc::NetworkManager* network_manager);
   CONTENT_EXPORT ~EmptyNetworkManager() override;
 
   // rtc::NetworkManager:
   void StartUpdating() override;
   void StopUpdating() override;
   void GetNetworks(NetworkList* networks) const override;
+  bool GetDefaultLocalAddress(int family,
+                              rtc::IPAddress* ipaddress) const override;
 
  private:
   void FireEvent();
   void SendNetworksChangedSignal();
 
   base::ThreadChecker thread_checker_;
 
   // Track whether StartUpdating() has been called before.
   bool updating_started_ = false;
 
+  // |network_manager_| is just a reference, owned by
+  // PeerConnectionDependencyFactory.
+  rtc::NetworkManager* network_manager_;
+
   base::WeakPtrFactory<EmptyNetworkManager> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(EmptyNetworkManager);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_P2P_EMPTY_NETWORK_MANAGER_H_