Add sandbox ISA and extra compile flag fields to PNaCl translation cache key

components/nacl/common/pnacl_types.h

Index: components/nacl/common/pnacl_types.h
diff --git a/components/nacl/common/pnacl_types.h b/components/nacl/common/pnacl_types.h
index b897a195b0968b5a2e7fa72f331506a99a5f5165..a7e269d063647315d1cb014cd585ec39dacedf8c 100644
--- a/components/nacl/common/pnacl_types.h
+++ b/components/nacl/common/pnacl_types.h
@@ -27,6 +27,8 @@ struct PnaclCacheInfo {
   base::Time last_modified;
   std::string etag;
   bool has_no_store_header;
+  std::string sandbox_isa;
+  std::string extra_flags;
 };
 
 }  // namespace nacl