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

talk/app/webrtc/webrtcsession.h

Index: talk/app/webrtc/webrtcsession.h
diff --git a/talk/app/webrtc/webrtcsession.h b/talk/app/webrtc/webrtcsession.h
index 2d477e3beba8a7b9a3a78aa1fe3f28b86ae368c0..5d828bc5ce3b931913743286494ce75e4e7f4731 100644
--- a/talk/app/webrtc/webrtcsession.h
+++ b/talk/app/webrtc/webrtcsession.h
@@ -96,6 +96,10 @@ class IceObserver {
   // (via PeerConnectionObserver)
   virtual void OnIceComplete() {}
 
+  // Called anytime when all ICE transport channels becomes flaky or
+  // at least one changes back to unflaky.
+  virtual void OnIceFlakinessChange(bool flaky) {}
+
  protected:
   ~IceObserver() {}
 
@@ -298,6 +302,7 @@ class WebRtcSession : public cricket::BaseSession,
       cricket::TransportProxy* proxy,
       const cricket::Candidates& candidates);
   virtual void OnCandidatesAllocationDone();
+  void OnTransportFlaky(cricket::Transport* transport) override;
 
   // Enables media channels to allow sending of media.
   void EnableChannels();
@@ -342,6 +347,7 @@ class WebRtcSession : public cricket::BaseSession,
 
   std::string BadStateErrMsg(State state);
   void SetIceConnectionState(PeerConnectionInterface::IceConnectionState state);
+  void SetIceFlaky(bool flaky);
 
   bool ValidateBundleSettings(const cricket::SessionDescription* desc);
   bool HasRtcpMuxEnabled(const cricket::ContentInfo* content);
@@ -379,6 +385,7 @@ class WebRtcSession : public cricket::BaseSession,
   MediaStreamSignaling* mediastream_signaling_;
   IceObserver* ice_observer_;
   PeerConnectionInterface::IceConnectionState ice_connection_state_;
+  bool ice_flaky_;
   rtc::scoped_ptr<SessionDescriptionInterface> local_desc_;
   rtc::scoped_ptr<SessionDescriptionInterface> remote_desc_;
   // Candidates that arrived before the remote description was set.