Make P2PTransportChannel inherit from IceTransportInternal.

webrtc/p2p/base/icetransportinternal.h

Index: webrtc/p2p/base/icetransportinternal.h
diff --git a/webrtc/p2p/base/icetransportinternal.h b/webrtc/p2p/base/icetransportinternal.h
index 4c47a140a5145103bf1d259ccecdf5368d4fd7ea..e48b36ad10aee007cd562de3c0797875a77f3d9e 100644
--- a/webrtc/p2p/base/icetransportinternal.h
+++ b/webrtc/p2p/base/icetransportinternal.h
@@ -25,11 +25,12 @@ class MetricsObserverInterface;
 
 namespace cricket {
 
-enum class TransportState {
+// TODO(zhihuang): replace it with PeerConnectionInterface::IceConnectionState.
+enum class IceTransportState {
   STATE_INIT,
   STATE_CONNECTING,  // Will enter this state once a connection is created
   STATE_COMPLETED,
-  STATE_FAILEDs
+  STATE_FAILED
 };
 
 // TODO(zhihuang): Remove this once it's no longer used in
@@ -44,9 +45,9 @@ enum IceProtocolType {
 // the IceTransportInterface will be split from this class.
 class IceTransportInternal : public rtc::PacketTransportInterface {
  public:
-  virtual ~IceTransportInternal();
+  virtual ~IceTransportInternal(){};
 
-  virtual TransportState GetState() const = 0;
+  virtual IceTransportState GetState() const = 0;
 
   virtual const std::string& transport_name() const = 0;
 
@@ -95,6 +96,9 @@ class IceTransportInternal : public rtc::PacketTransportInterface {
 
   virtual IceGatheringState gathering_state() const = 0;
 
+  // Returns the current stats for this connection.
+  virtual bool GetStats(ConnectionInfos* infos) = 0;
+
   sigslot::signal1<IceTransportInternal*> SignalGatheringState;
 
   // Handles sending and receiving of candidates.
@@ -119,11 +123,20 @@ class IceTransportInternal : public rtc::PacketTransportInterface {
   sigslot::signal4<IceTransportInternal*, CandidatePairInterface*, int, bool>
       SignalSelectedCandidatePairChanged;
 
+  // Invoked when there is conflict in the ICE role between local and remote
+  // agents.
+  sigslot::signal1<IceTransportInternal*> SignalRoleConflict;
+
+  // Emitted whenever the transport state changed.
+  sigslot::signal1<IceTransportInternal*> SignalStateChanged;
+
   // Invoked when the transport is being destroyed.
   sigslot::signal1<IceTransportInternal*> SignalDestroyed;
 
   // Debugging description of this transport.
-  std::string ToString() const;
+  std::string debug_name() const override {
+    return transport_name() + " " + std::to_string(component());
+  }
 };
 
 }  // namespace cricket