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 f6021615f083e19ea0684355e7c884a4a56eaea9..f9347d72e5fa3e0a1aa6dad32b85fa3667ad98c6 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();