Use continual gathering to restore backup connections

webrtc/p2p/base/portallocator.h

Index: webrtc/p2p/base/portallocator.h
diff --git a/webrtc/p2p/base/portallocator.h b/webrtc/p2p/base/portallocator.h
index 7d2a59f278ccb307ce0266ef89f65234eb291768..d160176ee3855c325d1ac97c8e02cbb13d4cc6b8 100644
--- a/webrtc/p2p/base/portallocator.h
+++ b/webrtc/p2p/base/portallocator.h
@@ -23,6 +23,10 @@
 #include "webrtc/base/sigslot.h"
 #include "webrtc/base/thread.h"
 
+namespace rtc {
+class Network;
+}  // namespace rtc
+
 namespace cricket {
 
 // PortAllocator is responsible for allocating Port types for a given
@@ -165,6 +169,8 @@ class PortAllocatorSession : public sigslot::has_slots<> {
   virtual void ClearGettingPorts() = 0;
   // Whether the process of getting ports has been stopped.
   virtual bool IsGettingPorts() = 0;
+  virtual void InactivateNetworksInExistingSequences(

[Taylor Brandstetter, 2016/06/06 18:18:37]

Should probably be "Deactivate".

[honghaiz3, 2016/06/07 16:42:06]

I looked it up in the online dictionary and googled these two words. It appears
that both are valid words and have similar meanings. See an example discussion
here. 
http://english.stackexchange.com/questions/568/is-inactivate-really-a-word
I slightly prefer inactivate because it has the same prefix as inactive, making
me feel it is more consistent with the usage of variable "inactive". 

[Taylor Brandstetter, 2016/06/07 17:13:26]

Acknowledged.

+      std::vector<rtc::Network*>* networks) {}
 
   // Another way of getting the information provided by the signals below.
   //
@@ -263,6 +269,8 @@ class PortAllocator : public sigslot::has_slots<> {
   // loopback interfaces.
   virtual void SetNetworkIgnoreMask(int network_ignore_mask) = 0;
 
+  virtual void GetNetworks(std::vector<rtc::Network*>* networks) const = 0;
+
   std::unique_ptr<PortAllocatorSession> CreateSession(
       const std::string& sid,
       const std::string& content_name,