Revert "Add an IPC for PNaCl to check if the session is incognito,"

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 3bdd4cafd8f7f8f7d47a14fccbcc99b8add4927c..8f58f2dbb58b79a6203632c8adabb8dd4f528fa8 100644
--- a/ppapi/c/private/ppb_nacl_private.h
+++ b/ppapi/c/private/ppb_nacl_private.h
@@ -11,7 +11,7 @@
 #include "ppapi/c/pp_stdint.h"
 #include "ppapi/c/private/pp_file_handle.h"
 
-#define PPB_NACL_PRIVATE_INTERFACE "PPB_NaCl(Private);0.8"
+#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
@@ -66,9 +66,6 @@ struct PPB_NaCl_Private {
   // 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);
-
-  // Return true if we are off the record.
-  PP_Bool (*IsOffTheRecord)();
 };
 
 #endif  // PPAPI_C_PRIVATE_PPB_NACL_PRIVATE_H_