Fixing bug where Connection drops packets when presumed writable.

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 a0b3a3ef5f91102c3626518b15c8645fab757218..fc22b2089af49e7ca972fbfdb9a1355bf1af5479 100644
--- a/webrtc/p2p/base/p2ptransportchannel.h
+++ b/webrtc/p2p/base/p2ptransportchannel.h
@@ -212,6 +212,8 @@ class P2PTransportChannel : public TransportChannelImpl,
   // A transport channel is weak if the current best connection is either
   // not receiving or not writable, or if there is no best connection at all.
   bool weak() const;
+  // Returns true if it's possible to send packets on this channel.
+  bool ReadyToSend() const;
   void UpdateConnectionStates();
   void RequestSort();