Add validation caching interface.

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 b62d6a2ff56dac5cd9f951cd72c74e5c1a580fe9..8a6ea5665e7a46e407a969eef30cd030b82d8533 100644
--- a/src/trusted/validator/ncvalidate.h
+++ b/src/trusted/validator/ncvalidate.h
@@ -27,6 +27,7 @@
 #include "native_client/src/include/nacl_base.h"
 #include "native_client/src/shared/utils/types.h"
 #include "native_client/src/trusted/validator/cpufeatures.h"
+#include "native_client/src/trusted/validator/validation_cache.h"
 
 EXTERN_C_BEGIN
 
@@ -110,7 +111,8 @@ extern NaClValidationStatus NACL_SUBARCH_NAME(ApplyValidator,
     uint8_t                 *data,
     size_t                  size,
     int                     bundle_size,
-    NaClCPUFeatures         *cpu_features);
+    NaClCPUFeatures         *cpu_features,
+    NaClValidationCache     *cache);
 
 /* Applies the validator, as used in a command-line tool to report issues.
  * Note: This is intentionally separated from ApplyValidator, since it need