Exclude host-side code from the NaCl IRT proxy build.

ppapi/proxy/ppb_file_io_proxy.cc

Index: ppapi/proxy/ppb_file_io_proxy.cc
===================================================================
--- ppapi/proxy/ppb_file_io_proxy.cc	(revision 161336)
+++ ppapi/proxy/ppb_file_io_proxy.cc	(working copy)
@@ -28,7 +28,9 @@
 // partial read.
 static const int32_t kMaxReadSize = 33554432;  // 32MB
 
+#if !defined(OS_NACL)
 typedef EnterHostFromHostResourceForceCallback<PPB_FileIO_API> EnterHostFileIO;
+#endif
 typedef EnterPluginFromHostResource<PPB_FileIO_API> EnterPluginFileIO;
 
 class FileIO : public PPB_FileIO_Shared {
@@ -218,6 +220,7 @@
 bool PPB_FileIO_Proxy::OnMessageReceived(const IPC::Message& msg) {
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(PPB_FileIO_Proxy, msg)
+  #if !defined(OS_NACL)
     // Plugin -> host message.
     IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBFileIO_Create, OnHostMsgCreate)
     IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBFileIO_Open, OnHostMsgOpen)
@@ -231,7 +234,7 @@
     IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBFileIO_WillWrite, OnHostMsgWillWrite)
     IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBFileIO_WillSetLength,
                         OnHostMsgWillSetLength)
-
+#endif  // !defined(OS_NACL)
     // Host -> plugin messages.
     IPC_MESSAGE_HANDLER(PpapiMsg_PPBFileIO_GeneralComplete,
                         OnPluginMsgGeneralComplete)
@@ -246,6 +249,7 @@
   return handled;
 }
 
+#if !defined(OS_NACL)
 void PPB_FileIO_Proxy::OnHostMsgCreate(PP_Instance instance,
                                        HostResource* result) {
   thunk::EnterResourceCreation enter(instance);
@@ -370,6 +374,7 @@
   if (enter.succeeded())
     enter.SetResult(enter.object()->WillSetLength(length, enter.callback()));
 }
+#endif  // !defined(OS_NACL)
 
 void PPB_FileIO_Proxy::OnPluginMsgGeneralComplete(
     const HostResource& host_resource,
@@ -410,6 +415,7 @@
   }
 }
 
+#if !defined(OS_NACL)
 void PPB_FileIO_Proxy::GeneralCallbackCompleteInHost(
     int32_t pp_error,
     const HostResource& host_resource) {
@@ -445,6 +451,7 @@
                                            *data));
   delete data;
 }
+#endif  // !defined(OS_NACL)
 
 }  // namespace proxy
 }  // namespace ppapi