A few updates on connection states

webrtc/p2p/base/p2ptransportchannel.h

Index: webrtc/p2p/base/p2ptransportchannel.h
diff --git a/webrtc/p2p/base/p2ptransportchannel.h b/webrtc/p2p/base/p2ptransportchannel.h
index 335ee7d166205040c24b3cb0a74dc12bec59ca97..5b8d0a8aadbb858c40d96e4d6b5f1e9e842c8e60 100644
--- a/webrtc/p2p/base/p2ptransportchannel.h
+++ b/webrtc/p2p/base/p2ptransportchannel.h
@@ -177,10 +177,11 @@ class P2PTransportChannel : public TransportChannelImpl,
   void HandleAllTimedOut();
 
   Connection* GetBestConnectionOnNetwork(rtc::Network* network) const;
-  bool CreateConnections(const Candidate &remote_candidate,
-                         PortInterface* origin_port, bool readable);
-  bool CreateConnection(PortInterface* port, const Candidate& remote_candidate,
-                        PortInterface* origin_port, bool readable);
+  bool CreateConnections(const Candidate& remote_candidate,
+                         PortInterface* origin_port);
+  bool CreateConnection(PortInterface* port,
+                        const Candidate& remote_candidate,
+                        PortInterface* origin_port);
   bool FindConnection(cricket::Connection* connection) const;
 
   uint32 GetRemoteCandidateGeneration(const Candidate& candidate);
@@ -215,9 +216,7 @@ class P2PTransportChannel : public TransportChannelImpl,
 
   virtual void OnMessage(rtc::Message *pmsg);
   void OnSort();
-  void OnPing();
-
-  void OnCheckReceiving();
+  void OnCheckAndPing();
 
   void PruneConnections();
   Connection* best_nominated_connection() const;
@@ -235,6 +234,7 @@ class P2PTransportChannel : public TransportChannelImpl,
   // Connection selected by the controlling agent. This should be used only
   // at controlled side when protocol type is RFC5245.
   Connection* pending_best_connection_;
+  Connection* next_connection_to_ping_;
   std::vector<RemoteCandidate> remote_candidates_;
   bool sort_dirty_;  // indicates whether another sort is needed right now
   bool was_writable_;
@@ -251,6 +251,8 @@ class P2PTransportChannel : public TransportChannelImpl,
 
   int check_receiving_delay_;
   int receiving_timeout_;
+  int ping_delay_;
+  uint32 last_ping_sent_;
 
   DISALLOW_COPY_AND_ASSIGN(P2PTransportChannel);
 };