Extend IRT with nacl_irt_resource_open interface

src/shared/ppapi_proxy/ppruntime.h

-// Copyright (c) 2010 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.
+/*
+ * 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_PPRUNTIME_H_
 #define NATIVE_CLIENT_SRC_SHARED_PPAPI_PROXY_PPRUNTIME_H_
 
 #include "native_client/src/include/portability.h"
 #include "native_client/src/untrusted/irt/irt_ppapi.h"
 
 EXTERN_C_BEGIN
 
+// Initialize srpc connection to the browser. Some APIs like manifest file
+// opening do not need full ppapi initialization and so can be used after
+// this function returns.
+int IrtInit();
+
 // The entry point for the main thread of the PPAPI plugin process.
 int PpapiPluginMain();
 
 void PpapiPluginRegisterThreadCreator(
     const struct PP_ThreadFunctions* new_funcs);
 
 void PpapiPluginRegisterDefaultThreadCreator();
 
 EXTERN_C_END
 
 #endif  // NATIVE_CLIENT_SRC_SHARED_PPAPI_PROXY_PPRUNTIME_H_