Provide metadata to validator to allow faster caching.

src/tools/validator_tools/ncstubout.c

 /*
  * Copyright (c) 2012 The Native Client Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 /*
  * This tool rewrites ELF files to replace instructions that will be
  * rejected by the validator with safe HLT instructions.  This is
  * useful if you have a large library in which many functions do not
@@ skipping 50 matching lines @@
   }
   /* Pretend that the CPU supports every feature so that we will only stub out
    * instructions that NaCl will never allow under any condition.
    */
   validator->SetAllCPUFeatures(cpu_features);
 
   status = validator->Validate(
       load_address, code, code_size,
       /* stubout_mode= */ TRUE,
       /* readonly_text= */ FALSE,
-      cpu_features, NULL);
+      cpu_features,
+      /* metadata= */ NULL,
+      /* cache= */ NULL);
   if (status == NaClValidationSucceeded) {
     /* Now run the validator again, so that we report any errors
      * that were not fixed by stubbing out. This is done so that
      * the user knows that stubout doesn't fix all errors.
      */
     status = NACL_SUBARCH_NAME(ApplyValidatorVerbosely,
                                NACL_TARGET_ARCH,
                                NACL_TARGET_SUBARCH)
         (load_address, code, code_size, cpu_features);
   }
@@ skipping 129 matching lines @@
     fprintf(stderr, "Usage: %s <input-file> -o <output-file>\n\n", argv[0]);
     fprintf(stderr,
             "This tool rewrites ELF objects to replace instructions that are\n"
             "rejected by the NaCl validator with safe HLT instructions.\n");
     GioFileDtor((struct Gio*) &err);
     return 1;
   }
   GioFileDtor((struct Gio*) &err);
   return FixUpELFFile(argv[1], argv[3]) ? 0 : 1;
 }