Implement open_resource in non-SFI mode.

ppapi/nacl_irt/irt_manifest.cc

+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "ppapi/nacl_irt/irt_manifest.h"
+
+#include <errno.h>
+
+#include "ppapi/nacl_irt/manifest_service.h"
+#include "ppapi/nacl_irt/plugin_startup.h"
+
+namespace ppapi {
+
+int IrtOpenResource(const char* file, int* fd) {
+  // Remove leading '/' character.
+  if (file[0] == '/')
+    ++file;
+
+  ManifestService* manifest_service = GetManifestService();
+  if (manifest_service == NULL ||
+      !manifest_service->OpenResource(file, fd)) {
+    return EIO;

[Mark Seaborn, 2014/04/26 00:18:59]

Does it work to #include
native_client/src/trusted/service_runtime/include/sys/errno.h and use
NACL_ABI_EIO and NACL_ABI_ENOENT?

If not, could you just add a TODO to use those names?

[hidehiko, 2014/04/28 08:44:27]

Done.

+  }
+
+  return (*fd == -1) ? ENOENT : 0;
+}
+
+}  // namespace ppapi