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 cce0279d32e2a786970ab9370545ea46e9033e22..0d34ed70c95848341d3dcca5c024b7b93d07b2e7 100644
--- a/webrtc/base/virtualsocketserver.h
+++ b/webrtc/base/virtualsocketserver.h
@@ -112,6 +112,11 @@ class VirtualSocketServer : public SocketServer, public sigslot::has_slots<> {
   bool Wait(int cms, bool process_io) override;
   void WakeUp() override;
 
+  void SetDelayOnSocketAddress(const rtc::SocketAddress& address,
+                               int delay_ms) {
+    delays_[address] = delay_ms;
+  }
+
   typedef std::pair<double, double> Point;
   typedef std::vector<Point> Function;
 
@@ -194,8 +199,10 @@ class VirtualSocketServer : public SocketServer, public sigslot::has_slots<> {
   // Computes the number of milliseconds required to send a packet of this size.
   uint32_t SendDelay(uint32_t size);
 
-  // Returns a random transit delay chosen from the appropriate distribution.
-  uint32_t GetRandomTransitDelay();
+  // If the delay has been set for the address of the socket, returns the set
+  // delay. Otherwise, returns a random transit delay chosen from the
+  // appropriate distribution.
+  uint32_t GetTransitDelay(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 +267,10 @@ class VirtualSocketServer : public SocketServer, public sigslot::has_slots<> {
   uint32_t delay_mean_;
   uint32_t delay_stddev_;
   uint32_t delay_samples_;
-  Function* delay_dist_;
+
+  std::map<rtc::SocketAddress, int> delays_;
+  std::unique_ptr<Function> delay_dist_;
+
   CriticalSection delay_crit_;
 
   double drop_prob_;