Adding "adapter" ORTC objects on top of ChannelManager/BaseChannel/etc.

webrtc/p2p/base/packettransportinternal.h

Index: webrtc/p2p/base/packettransportinternal.h
diff --git a/webrtc/p2p/base/packettransportinterface.h b/webrtc/p2p/base/packettransportinternal.h
similarity index 78%
rename from webrtc/p2p/base/packettransportinterface.h
rename to webrtc/p2p/base/packettransportinternal.h
index 04130ef040b811cb726da637addad134ed587c5f..77c409c019801a257948566812fc0d84cd5d5150 100644
--- a/webrtc/p2p/base/packettransportinterface.h
+++ b/webrtc/p2p/base/packettransportinternal.h
@@ -8,12 +8,13 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#ifndef WEBRTC_P2P_BASE_PACKETTRANSPORTINTERFACE_H_
-#define WEBRTC_P2P_BASE_PACKETTRANSPORTINTERFACE_H_
+#ifndef WEBRTC_P2P_BASE_PACKETTRANSPORTINTERNAL_H_
+#define WEBRTC_P2P_BASE_PACKETTRANSPORTINTERNAL_H_
 
 #include <string>
 #include <vector>
 
+#include "webrtc/api/ortc/packettransportinterface.h"
 // This is included for PacketOptions.
 #include "webrtc/base/asyncpacketsocket.h"
 #include "webrtc/base/sigslot.h"
@@ -28,10 +29,9 @@ struct PacketOptions;
 struct PacketTime;
 struct SentPacket;
 
-class PacketTransportInterface : public sigslot::has_slots<> {
+class PacketTransportInternal : public virtual webrtc::PacketTransportInterface,
+                                public sigslot::has_slots<> {
  public:
-  virtual ~PacketTransportInterface() {}
-
   // Identify the object for logging and debug purpose.
   virtual std::string debug_name() const = 0;
 
@@ -67,20 +67,20 @@ class PacketTransportInterface : public sigslot::has_slots<> {
   virtual int GetError() = 0;
 
   // Emitted when the writable state, represented by |writable()|, changes.
-  sigslot::signal1<PacketTransportInterface*> SignalWritableState;
+  sigslot::signal1<PacketTransportInternal*> SignalWritableState;
 
-  //  Emitted when the PacketTransportInterface is ready to send packets. "Ready
+  //  Emitted when the PacketTransportInternal is ready to send packets. "Ready
   //  to send" is more sensitive than the writable state; a transport may be
   //  writable, but temporarily not able to send packets. For example, the
   //  underlying transport's socket buffer may be full, as indicated by
   //  SendPacket's return code and/or GetError.
-  sigslot::signal1<PacketTransportInterface*> SignalReadyToSend;
+  sigslot::signal1<PacketTransportInternal*> SignalReadyToSend;
 
   // Emitted when receiving state changes to true.
-  sigslot::signal1<PacketTransportInterface*> SignalReceivingState;
+  sigslot::signal1<PacketTransportInternal*> SignalReceivingState;
 
   // Signalled each time a packet is received on this channel.
-  sigslot::signal5<PacketTransportInterface*,
+  sigslot::signal5<PacketTransportInternal*,
                    const char*,
                    size_t,
                    const rtc::PacketTime&,
@@ -88,10 +88,13 @@ class PacketTransportInterface : public sigslot::has_slots<> {
       SignalReadPacket;
 
   // Signalled each time a packet is sent on this channel.
-  sigslot::signal2<PacketTransportInterface*, const rtc::SentPacket&>
+  sigslot::signal2<PacketTransportInternal*, const rtc::SentPacket&>
       SignalSentPacket;
+
+ protected:
+  PacketTransportInternal* GetInternal() { return this; }
 };
 
 }  // namespace rtc
 
-#endif  // WEBRTC_P2P_BASE_PACKETTRANSPORTINTERFACE_H_
+#endif  // WEBRTC_P2P_BASE_PACKETTRANSPORTINTERNAL_H_