Implement open_resource in non-SFI mode.

ppapi/nacl_irt/irt_manifest.h

Index: ppapi/nacl_irt/irt_manifest.h
diff --git a/ppapi/nacl_irt/irt_manifest.h b/ppapi/nacl_irt/irt_manifest.h
new file mode 100644
index 0000000000000000000000000000000000000000..b1e09235747ee42e28247c958964be3fe4b94b97
--- /dev/null
+++ b/ppapi/nacl_irt/irt_manifest.h
@@ -0,0 +1,21 @@
+// 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.
+
+#ifndef PPAPI_NACL_IRT_IRT_MANIFEST_H_
+#define PPAPI_NACL_IRT_IRT_MANIFEST_H_
+
+#include "ppapi/proxy/ppapi_proxy_export.h"
+
+namespace ppapi {
+
+// The implementation of irt_open_resource() based on ManifestService.
+// This communicates with the renderer process via Chrome IPC to obtain the
+// read-only file descriptor of the resource specified in the manifest file
+// with the key |file| in files section. Returns 0 on success, or error number
+// on failure. See also irt_open_resource()'s comment.
+PPAPI_PROXY_EXPORT int IrtOpenResource(const char* file, int* fd);
+
+}  // namespace ppapi
+
+#endif  // PPAPI_NACL_IRT_IRT_MANIFEST_H_