face: face refactoring completion

* delete old Face
* rename LpFace as Face
* eliminate LpFaceWrapper and use new Face

refs #3172

Change-Id: I08c3a5dfb4cc1b9834b30cccd9ab634535d0608c
diff --git a/daemon/face/transport.hpp b/daemon/face/transport.hpp
index 626809c..56ff730 100644
--- a/daemon/face/transport.hpp
+++ b/daemon/face/transport.hpp
@@ -33,7 +33,7 @@
 namespace nfd {
 namespace face {
 
-class LpFace;
+class Face;
 class LinkService;
 
 /** \brief indicates the state of a transport
@@ -98,8 +98,8 @@
  */
 const ssize_t MTU_INVALID = -2;
 
-/** \brief the lower part of an LpFace
- *  \sa LpFace
+/** \brief the lower part of a Face
+ *  \sa Face
  */
 class Transport : protected virtual TransportCounters, noncopyable
 {
@@ -154,11 +154,11 @@
    *  \pre setFaceAndLinkService has not been called
    */
   void
-  setFaceAndLinkService(LpFace& face, LinkService& service);
+  setFaceAndLinkService(Face& face, LinkService& service);
 
   /** \return Face to which this Transport is attached
    */
-  const LpFace*
+  const Face*
   getFace() const;
 
   /** \return LinkService to which this Transport is attached
@@ -307,7 +307,7 @@
   doSend(Packet&& packet) = 0;
 
 private:
-  LpFace* m_face;
+  Face* m_face;
   LinkService* m_service;
   FaceUri m_localUri;
   FaceUri m_remoteUri;
@@ -318,7 +318,7 @@
   TransportState m_state;
 };
 
-inline const LpFace*
+inline const Face*
 Transport::getFace() const
 {
   return m_face;