Revert of Refactoring that removes P2PTransport and DtlsTransport classes.

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 e538dc2c9739f466ac603daeceb1e353a46a9df6..cdb83005b6a2a519d247bf03b0df713aee979c4a 100644
--- a/webrtc/p2p/base/p2ptransportchannel.h
+++ b/webrtc/p2p/base/p2ptransportchannel.h
@@ -29,6 +29,7 @@
 #include "webrtc/base/constructormagic.h"
 #include "webrtc/p2p/base/candidate.h"
 #include "webrtc/p2p/base/candidatepairinterface.h"
+#include "webrtc/p2p/base/p2ptransport.h"
 #include "webrtc/p2p/base/portallocator.h"
 #include "webrtc/p2p/base/portinterface.h"
 #include "webrtc/p2p/base/transportchannelimpl.h"
@@ -65,6 +66,12 @@
  public:
   P2PTransportChannel(const std::string& transport_name,
                       int component,
+                      PortAllocator* allocator);
+  // TODO(mikescarlett): Deprecated. Remove when Chromium's
+  // IceTransportChannel does not depend on this.
+  P2PTransportChannel(const std::string& transport_name,
+                      int component,
+                      P2PTransport* transport,
                       PortAllocator* allocator);
   virtual ~P2PTransportChannel();