Cloning a bunch of stuff from the native_client repository at r6528

ppapi/native_client/src/shared/ppapi_proxy/plugin_nacl_file.h

+/*
+  Copyright (c) 2011 The Native Client 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 NATIVE_CLIENT_SRC_SHARED_PPAPI_PROXY_PLUGIN_NACL_FILE_H
+#define NATIVE_CLIENT_SRC_SHARED_PPAPI_PROXY_PLUGIN_NACL_FILE_H
+
+#include "ppapi/c/pp_completion_callback.h"
+#include "ppapi/c/pp_instance.h"
+
+namespace ppapi_proxy {
+
+// Loads |url| asynchronously notifying the |callback| of the final result.
+// If the call cannot be completed asynchronously, |callback|
+// will not be invoked. Returns one of the PP_ERROR codes.
+int32_t StreamAsFile(PP_Instance instance,
+                     const char* url,
+                     struct PP_CompletionCallback callback);
+
+// Returns an open file descriptor for a |url| loaded using StreamAsFile()
+// or -1 if it has not been loaded.
+int GetFileDesc(PP_Instance instance,
+                const char* url);
+
+}  // namespace ppapi_proxy
+
+#endif /*  NATIVE_CLIENT_SRC_SHARED_PPAPI_PROXY_PLUGIN_NACL_FILE_H */