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

webrtc/p2p/base/transportchannel.h

Index: webrtc/p2p/base/transportchannel.h
diff --git a/webrtc/p2p/base/transportchannel.h b/webrtc/p2p/base/transportchannel.h
index 7d0d1f45b2f89c8341694e6e4659b2b5d824a957..1dd19a21e7052364d3769993028e083b372f416a 100644
--- a/webrtc/p2p/base/transportchannel.h
+++ b/webrtc/p2p/base/transportchannel.h
@@ -72,6 +72,9 @@ class TransportChannel : public sigslot::has_slots<> {
   // Emitted when the TransportChannel's ability to send has changed.
   sigslot::signal1<TransportChannel*> SignalReadyToSend;
 
+  bool flaky() const { return flaky_; }
+  sigslot::signal1<TransportChannel*> SignalFlakyState;
+
   // Attempts to send the given packet.  The return value is < 0 on failure.
   // TODO: Remove the default argument once channel code is updated.
   virtual int SendPacket(const char* data, size_t len,
@@ -142,6 +145,9 @@ class TransportChannel : public sigslot::has_slots<> {
   // Sets the writable state, signaling if necessary.
   void set_writable(bool writable);
 
+  // Sets the flaky state, signaling if necessary.
+  void set_flaky(bool flaky);
+
 
  private:
   // Used mostly for debugging.
@@ -149,6 +155,7 @@ class TransportChannel : public sigslot::has_slots<> {
   int component_;
   bool readable_;
   bool writable_;
+  bool flaky_;
 
   DISALLOW_COPY_AND_ASSIGN(TransportChannel);
 };