NaCl: enable meta-based validation for shared libraries.

chrome/nacl/nacl_validation_query.h

Index: chrome/nacl/nacl_validation_query.h
diff --git a/chrome/nacl/nacl_validation_query.h b/chrome/nacl/nacl_validation_query.h
index fe82649bf12c940273c7e0ccfdaf59984bd2bec1..a849b81dcca8b4be63b9a9cd1a759bd38a381785 100644
--- a/chrome/nacl/nacl_validation_query.h
+++ b/chrome/nacl/nacl_validation_query.h
@@ -11,6 +11,7 @@
 #include "base/strings/string_piece.h"
 #include "crypto/hmac.h"
 
+struct NaClFileToken;
 struct NaClValidationCache;
 class NaClValidationDB;
 class NaClValidationQuery;
@@ -23,6 +24,9 @@ class NaClValidationQueryContext {
 
   NaClValidationQuery* CreateQuery();
 
+  bool ResolveFileToken(struct NaClFileToken* file_token, int32* fd,
+                        std::string* path);
+
  private:
   NaClValidationDB* db_;