Provide metadata to validator to allow faster caching.

src/trusted/service_runtime/nacl_text.h

Index: src/trusted/service_runtime/nacl_text.h
diff --git a/src/trusted/service_runtime/nacl_text.h b/src/trusted/service_runtime/nacl_text.h
index 0f92c5b13e0dcb896c083170199e16fdedb8be96..171010b392693f509b7bd3c78600b4b84d0effec 100644
--- a/src/trusted/service_runtime/nacl_text.h
+++ b/src/trusted/service_runtime/nacl_text.h
@@ -22,6 +22,8 @@ struct NaClDynamicRegion {
   int delete_generation;
 };
 
+struct NaClValidationMetadata;
+
 /*
  * Create a shared memory descriptor and map it into the text region
  * of the address space.  This implies that the text size must be a
@@ -34,10 +36,12 @@ int NaClDescEffectorShmCtor(struct NaClDescEffectorShm *self) NACL_WUR;
 
 int NaClMinimumThreadGeneration(struct NaClApp *nap);
 
-int32_t NaClTextDyncodeCreate(struct NaClApp *nap,
-                              uint32_t       dest,
-                              void           *code_copy,
-                              uint32_t       size) NACL_WUR;
+int32_t NaClTextDyncodeCreate(
+    struct NaClApp *nap,
+    uint32_t       dest,
+    void           *code_copy,
+    uint32_t       size,
+    const struct NaClValidationMetadata *metadata) NACL_WUR;
 
 int32_t NaClSysDyncodeCreate(struct NaClAppThread *natp,
                              uint32_t             dest,