Add back P2PTransportChannel.Connect, for Chromium.

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 59bb773bf4d557b692d779048e13e1b3bed545f5..d90cc61ebc7cd7058c5c9acad6765628319fba27 100644
--- a/webrtc/p2p/base/p2ptransportchannel.h
+++ b/webrtc/p2p/base/p2ptransportchannel.h
@@ -93,6 +93,9 @@ class P2PTransportChannel : public TransportChannelImpl,
   void SetRemoteIceCredentials(const std::string& ice_ufrag,
                                const std::string& ice_pwd) override;
   void SetRemoteIceMode(IceMode mode) override;
+  // TODO(deadbeef): Deprecated. Remove when Chromium's
+  // IceTransportChannel does not depend on this.
+  void Connect() {}
   void MaybeStartGathering() override;
   IceGatheringState gathering_state() const override {
     return gathering_state_;