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/packettransportinternal.h b/webrtc/p2p/base/packettransportinternal.h
index 5789c62eeacaec610afc088475336e37c1c4efad..2c9d86d9ee8b783725f15a122308af653a5325e7 100644
--- a/webrtc/p2p/base/packettransportinternal.h
+++ b/webrtc/p2p/base/packettransportinternal.h
@@ -1,5 +1,5 @@
 /*
- *  Copyright 2016 The WebRTC Project Authors. All rights reserved.
+ *  Copyright 2017 The WebRTC Project Authors. All rights reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
@@ -14,6 +14,7 @@
 #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 PacketTransportInternal : public sigslot::has_slots<> {
+class PacketTransportInternal : public virtual webrtc::PacketTransportInterface,
+                                public sigslot::has_slots<> {
  public:
-  virtual ~PacketTransportInternal() {}
-
   // Identify the object for logging and debug purpose.
   virtual std::string debug_name() const = 0;
 
@@ -59,7 +59,7 @@ class PacketTransportInternal : public sigslot::has_slots<> {
   // supported by all transport types.
   virtual int SetOption(rtc::Socket::Option opt, int value) = 0;
 
-  // TODO(pthatcher): Once Chrome's MockPacketTransportInternal implements
+  // TODO(pthatcher): Once Chrome's MockPacketTransportInterface implements
   // this, remove the default implementation.
   virtual bool GetOption(rtc::Socket::Option opt, int* value) { return false; }
 
@@ -90,6 +90,9 @@ class PacketTransportInternal : public sigslot::has_slots<> {
   // Signalled each time a packet is sent on this channel.
   sigslot::signal2<PacketTransportInternal*, const rtc::SentPacket&>
       SignalSentPacket;
+
+ protected:
+  PacketTransportInternal* GetInternal() override { return this; }
 };
 
 }  // namespace rtc