[dart:io] Namespaces for file IO

runtime/bin/security_context_fuchsia.cc

 // Copyright (c) 2017, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #if !defined(DART_IO_SECURE_SOCKET_DISABLED)
 
 #include "platform/globals.h"
 #if defined(HOST_OS_FUCHSIA)
 
 #include "bin/security_context.h"
@@ skipping 27 matching lines @@
     LoadRootCertFile(commandline_root_certs_file);
     return;
   }
 
   if (commandline_root_certs_cache != NULL) {
     LoadRootCertCache(commandline_root_certs_cache);
     return;
   }
 
   const char* bundle = "/system/data/boringssl/cert.pem";
-  if (!File::Exists(bundle)) {
+  if (!File::Exists(NULL, bundle)) {
     FATAL1("Failed to find trusted certs at %s\n", bundle);
   }
 
   LoadRootCertFile(bundle);
 }
 
 void SSLCertContext::RegisterCallbacks(SSL* ssl) {
   // No callbacks to register for implementations using BoringSSL's built-in
   // verification mechanism.
 }
 
 }  // namespace bin
 }  // namespace dart
 
 #endif  // defined(HOST_OS_FUCHSIA)
 
 #endif  // !defined(DART_IO_SECURE_SOCKET_DISABLED)