Enable mmap and identity-based validation caching on pnacl-{llc,ld}.nexe

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 f42de0b9f224fc6e00d3be49d4c0f128c31267e9..b96b84c8299ea1db3afe5a0742993e54382045df 100644
--- a/ppapi/c/private/ppb_nacl_private.h
+++ b/ppapi/c/private/ppb_nacl_private.h
@@ -227,8 +227,12 @@ struct PPB_NaCl_Private_1_0 {
                                    uint32_t options);
   /* Returns a read-only file descriptor of a file rooted in the Pnacl
    * component directory, or an invalid handle on failure.
+   * The metadata |file_token_*| are 0 on failure.
    */
-  PP_FileHandle (*GetReadonlyPnaclFd)(const char* filename);
+  PP_FileHandle (*GetReadonlyPnaclFd)(const char* filename,
+                                      PP_Bool is_executable,
+                                      uint64_t* file_token_lo,
+                                      uint64_t* file_token_hi);
   /* 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.
@@ -271,7 +275,7 @@ struct PPB_NaCl_Private_1_0 {
   void (*ReportTranslationFinished)(PP_Instance instance, PP_Bool success);
   /* Opens a NaCl executable file in the application's extension directory
    * corresponding to the file URL and returns a file descriptor, or an invalid
-   * handle on failure. |metadata| is left unchanged on failure.
+   * handle on failure. The metadata |file_token*| are 0 on failure.
    */
   PP_FileHandle (*OpenNaClExecutable)(PP_Instance instance,
                                       const char* file_url,