Add ipc_channel_nacl to the untrusted build and fix all compile/link errors.

ipc/ipc_channel_nacl.h

Index: ipc/ipc_channel_nacl.h
===================================================================
--- ipc/ipc_channel_nacl.h	(revision 133452)
+++ ipc/ipc_channel_nacl.h	(working copy)
@@ -7,6 +7,7 @@
 #pragma once
 
 #include "ipc/ipc_channel.h"
+#include "ipc/ipc_channel_reader.h"
 
 namespace IPC {
 
@@ -33,6 +34,13 @@
   void ResetToAcceptingConnectionState();
   static bool IsNamedServerInitialized(const std::string& channel_id);
 
+  virtual ReadState ReadData(char* buffer,
+                             int buffer_len,
+                             int* bytes_read) OVERRIDE;
+  virtual bool WillDispatchInputMessage(Message* msg) OVERRIDE;
+  virtual bool DidEmptyInputBuffers() OVERRIDE;
+  virtual void HandleHelloMessage(const Message& msg) OVERRIDE;
+
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(ChannelImpl);
 };