Provide metadata to validator to allow faster caching.

src/trusted/validator/ncvalidate.h

Index: src/trusted/validator/ncvalidate.h
diff --git a/src/trusted/validator/ncvalidate.h b/src/trusted/validator/ncvalidate.h
index 164afd4313b2e01fc35ef47408476bb68863cee8..a1b52c770772a4f1cb4ca621ba6d59312c91e04c 100644
--- a/src/trusted/validator/ncvalidate.h
+++ b/src/trusted/validator/ncvalidate.h
@@ -17,6 +17,7 @@
 EXTERN_C_BEGIN
 
 struct NaClValidationCache;
+struct NaClValidationMetadata;
 
 /* Defines possible validation status values. */
 typedef enum NaClValidationStatus {
@@ -63,6 +64,7 @@ typedef NaClValidationStatus (*NaClValidateFunc)(
     int stubout_mode,
     int readonly_text,
     const NaClCPUFeatures *cpu_features,
+    const struct NaClValidationMetadata *metadata,
     struct NaClValidationCache *cache);
 
 /* Function type to copy an instruction safely. Returns non-zero on success.