Do not switch best connection on the controlled side too frequently

webrtc/p2p/base/port.h

Index: webrtc/p2p/base/port.h
diff --git a/webrtc/p2p/base/port.h b/webrtc/p2p/base/port.h
index 54f7acd7ac84089918889015866d0725bd69b07d..06231ecd3954db1fef1ca98c84d9a4907a808300 100644
--- a/webrtc/p2p/base/port.h
+++ b/webrtc/p2p/base/port.h
@@ -546,6 +546,8 @@ class Connection : public CandidatePairInterface,
   // Handles the binding request; sends a response if this is a valid request.
   void HandleBindingRequest(IceMessage* msg);
 
+  int64_t last_data_received() const { return last_data_received_; }
+
   // Debugging description of this connection
   std::string ToDebugId() const;
   std::string ToString() const;