Use continual gathering to restore backup connections

webrtc/p2p/client/basicportallocator.h

Index: webrtc/p2p/client/basicportallocator.h
diff --git a/webrtc/p2p/client/basicportallocator.h b/webrtc/p2p/client/basicportallocator.h
index 8ea66c431e76d560a6299c2831d77a1a83dfeb06..44202a710bb5f5450b0e596dc954033b0d1c3c9f 100644
--- a/webrtc/p2p/client/basicportallocator.h
+++ b/webrtc/p2p/client/basicportallocator.h
@@ -47,7 +47,9 @@ class BasicPortAllocator : public PortAllocator {
 
   int network_ignore_mask() const { return network_ignore_mask_; }
 
-  rtc::NetworkManager* network_manager() { return network_manager_; }
+  rtc::NetworkManager* network_manager() const override {
+    return network_manager_;
+  }
 
   // If socket_factory() is set to NULL each PortAllocatorSession
   // creates its own socket factory.
@@ -89,6 +91,7 @@ class BasicPortAllocatorSession : public PortAllocatorSession,
   rtc::PacketSocketFactory* socket_factory() { return socket_factory_; }
 
   void SetCandidateFilter(uint32_t filter) override;
+
   void StartGettingPorts() override;
   void StopGettingPorts() override;
   void ClearGettingPorts() override;
@@ -96,7 +99,9 @@ class BasicPortAllocatorSession : public PortAllocatorSession,
   // These will all be cricket::Ports.
   std::vector<PortInterface*> ReadyPorts() const override;
   std::vector<Candidate> ReadyCandidates() const override;
+  std::vector<Candidate> ReadyCandidates(PortInterface* port) const override;
   bool CandidatesAllocationDone() const override;
+  void GetPortsOnNetworks(const std::vector<rtc::Network*>* networks) override;
 
  protected:
   void UpdateIceParametersInternal() override;
@@ -255,11 +260,15 @@ class AllocationSequence : public rtc::MessageHandler,
   ~AllocationSequence();
   bool Init();
   void Clear();
-  void OnNetworkRemoved();
+  void OnNetworkInactivated();
 
   State state() const { return state_; }
   const rtc::Network* network() const { return network_; }
-  bool network_removed() const { return network_removed_; }
+
+  bool network_inactive() const { return network_inactive_; }
+  void set_network_inactive(bool network_inactive) {
+    network_inactive_ = network_inactive;
+  }
 
   // Disables the phases for a new sequence that this one already covers for an
   // equivalent network setup.
@@ -309,7 +318,7 @@ class AllocationSequence : public rtc::MessageHandler,
   void OnPortDestroyed(PortInterface* port);
 
   BasicPortAllocatorSession* session_;
-  bool network_removed_ = false;
+  bool network_inactive_ = false;
   rtc::Network* network_;
   rtc::IPAddress ip_;
   PortConfiguration* config_;