Add flakiness check if there is no received packets in a certain period.

talk/app/webrtc/peerconnectioninterface.h

 /*
  * libjingle
  * Copyright 2012 Google Inc.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
  *
  *  1. Redistributions of source code must retain the above copyright notice,
  *     this list of conditions and the following disclaimer.
  *  2. Redistributions in binary form must reproduce the above copyright notice,
@@ skipping 393 matching lines @@
   virtual void OnIceGatheringChange(
       PeerConnectionInterface::IceGatheringState new_state) {}
 
   // New Ice candidate have been found.
   virtual void OnIceCandidate(const IceCandidateInterface* candidate) = 0;
 
   // TODO(bemasc): Remove this once callers transition to OnIceGatheringChange.
   // All Ice candidates have been found.
   virtual void OnIceComplete() {}
 
+  // Called when the ICE connection receiving status changes.
+  virtual void OnIceConnectionReceivingChange(bool receiving) {}
+
  protected:
   // Dtor protected as objects shouldn't be deleted via this interface.
   ~PeerConnectionObserver() {}
 };
 
 // Factory class used for creating cricket::PortAllocator that is used
 // for ICE negotiation.
 class PortAllocatorFactoryInterface : public rtc::RefCountInterface {
  public:
   struct StunConfiguration {
@@ skipping 198 matching lines @@
 CreatePeerConnectionFactory(
     rtc::Thread* worker_thread,
     rtc::Thread* signaling_thread,
     AudioDeviceModule* default_adm,
     cricket::WebRtcVideoEncoderFactory* encoder_factory,
     cricket::WebRtcVideoDecoderFactory* decoder_factory);
 
 }  // namespace webrtc
 
 #endif  // TALK_APP_WEBRTC_PEERCONNECTIONINTERFACE_H_