Signal to remove remote candidates if ports are pruned.

webrtc/base/virtualsocketserver.h

Index: webrtc/base/virtualsocketserver.h
diff --git a/webrtc/base/virtualsocketserver.h b/webrtc/base/virtualsocketserver.h
index 565222bfd2453357f6c22204446b21a92b5df93d..c81fceca87fbc0c932abdf62d016f910860ceb62 100644
--- a/webrtc/base/virtualsocketserver.h
+++ b/webrtc/base/virtualsocketserver.h
@@ -79,8 +79,15 @@ class VirtualSocketServer : public SocketServer, public sigslot::has_slots<> {
   }
 
   // If the (transit) delay parameters are modified, this method should be
-  // called to recompute the new distribution.
+  // called to recompute the new distribution for the transit delay.
+  // If |delay_dist_ipv6_| is set, that will be used for the delay distribution
+  // of IPv6 sockets.
   void UpdateDelayDistribution();
+  // Computes a new delay distribution for IPv6 sockets using the current
+  // delay parameters. If this was not called to create a delay distribution
+  // for IPv6 sockets, IPv6 sockets use the same delay distribution as
+  // |delay_dist_| set by UpdateDelayDistribution().
+  void UpdateDelayDistributionForIPv6();
 
   // Controls the (uniform) probability that any sent packet is dropped.  This
   // is separate from calculations to drop based on queue size.
@@ -195,7 +202,7 @@ class VirtualSocketServer : public SocketServer, public sigslot::has_slots<> {
   uint32_t SendDelay(uint32_t size);
 
   // Returns a random transit delay chosen from the appropriate distribution.
-  uint32_t GetRandomTransitDelay();
+  uint32_t GetRandomTransitDelay(Socket* socket);
 
   // Basic operations on functions.  Those that return a function also take
   // ownership of the function given (and hence, may modify or delete it).
@@ -260,7 +267,9 @@ class VirtualSocketServer : public SocketServer, public sigslot::has_slots<> {
   uint32_t delay_mean_;
   uint32_t delay_stddev_;
   uint32_t delay_samples_;
-  Function* delay_dist_;
+  std::unique_ptr<Function> delay_dist_;
+  std::unique_ptr<Function> delay_dist_ipv6_;
+
   CriticalSection delay_crit_;
 
   double drop_prob_;