Add TransportSession interface to prepare for WebRTC-based transport.

remoting/protocol/libjingle_transport_factory.h

Index: remoting/protocol/libjingle_transport_factory.h
diff --git a/remoting/protocol/libjingle_transport_factory.h b/remoting/protocol/libjingle_transport_factory.h
index 1fd8855d98983ffee42dee97a74bd6f045e1e87e..2758eab598044069de7e95c48da37cc08d0f32d8 100644
--- a/remoting/protocol/libjingle_transport_factory.h
+++ b/remoting/protocol/libjingle_transport_factory.h
@@ -13,16 +13,9 @@
 
 namespace cricket {
 class HttpPortAllocatorBase;
-class PortAllocator;
 }  // namespace cricket
 
-namespace net {
-class URLRequestContextGetter;
-}  // namespace net
-
 namespace rtc {
-class NetworkManager;
-class PacketSocketFactory;
 class SocketAddress;
 }  // namespace rtc
 
@@ -33,7 +26,8 @@ class JingleInfoRequest;
 
 namespace protocol {
 
-class LibjingleTransportFactory : public TransportFactory {
+// TODO(sergeyu): Remove this class and move all code to IceTransportFactory.
+class LibjingleTransportFactory {
  public:
   // |signal_strategy| must outlive LibjingleTransportFactory. Need to use
   // cricket::HttpPortAllocatorBase pointer for the |port_allocator|, so that it
@@ -43,12 +37,10 @@ class LibjingleTransportFactory : public TransportFactory {
       scoped_ptr<cricket::HttpPortAllocatorBase> port_allocator,
       const NetworkSettings& network_settings,
       TransportRole role);
+  ~LibjingleTransportFactory();
 
-  ~LibjingleTransportFactory() override;
-
-  // TransportFactory interface.
-  void PrepareTokens() override;
-  scoped_ptr<Transport> CreateTransport() override;
+  void PrepareTokens();
+  scoped_ptr<Transport> CreateTransport();
 
  private:
   void EnsureFreshJingleInfo();