Add an interface for nacl to create delete-on-close temp files,

ppapi/c/private/ppb_nacl_private.h

Index: ppapi/c/private/ppb_nacl_private.h
diff --git a/ppapi/c/private/ppb_nacl_private.h b/ppapi/c/private/ppb_nacl_private.h
index 3972a9eeb4e32e0c8900e0fa8ff4b4a4ea8b862e..8f58f2dbb58b79a6203632c8adabb8dd4f528fa8 100644
--- a/ppapi/c/private/ppb_nacl_private.h
+++ b/ppapi/c/private/ppb_nacl_private.h
@@ -9,8 +9,9 @@
 #include "ppapi/c/pp_instance.h"
 #include "ppapi/c/pp_resource.h"
 #include "ppapi/c/pp_stdint.h"
+#include "ppapi/c/private/pp_file_handle.h"
 
-#define PPB_NACL_PRIVATE_INTERFACE "PPB_NaCl(Private);0.6"
+#define PPB_NACL_PRIVATE_INTERFACE "PPB_NaCl(Private);0.7"
 
 struct PPB_NaCl_Private {
   // This function launches NaCl's sel_ldr process.  On success, the function
@@ -59,7 +60,12 @@ struct PPB_NaCl_Private {
   // component directory, or -1 on error.
   // Do we want this to take a completion callback and be async, or
   // or could we make this happen on another thread?
-  int (*GetReadonlyPnaclFd)(const char* filename);
+  PP_FileHandle (*GetReadonlyPnaclFd)(const char* filename);
+
+  // This creates a temporary file that will be deleted by the time
+  // the last handle is closed (or earlier on POSIX systems), and
+  // returns a posix handle to that temporary file.
+  PP_FileHandle (*CreateTemporaryFile)(PP_Instance instance);
 };
 
 #endif  // PPAPI_C_PRIVATE_PPB_NACL_PRIVATE_H_