Split the PNaCl IRT shim into 3 pieces, and include one piece into IRT.

ppapi/generators/pnacl_shim.h

Index: ppapi/generators/pnacl_shim.h
diff --git a/ppapi/generators/pnacl_shim.h b/ppapi/generators/pnacl_shim.h
deleted file mode 100644
index 1002d07037a8eaa698249ae6a0a2934cd4fca0ff..0000000000000000000000000000000000000000
--- a/ppapi/generators/pnacl_shim.h
+++ /dev/null
@@ -1,29 +0,0 @@
-/* Copyright (c) 2011 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_GENERATORS_PNACL_SHIM_H_
-#define PPAPI_GENERATORS_PNACL_SHIM_H_
-
-#include "ppapi/c/ppb.h"
-
-/** Defines the interface exposed by the generated wrapper code. */
-
-/* There is not a typedef for PPP_GetInterface_type, but it is currently
- * the same as PPB_GetInterface. */
-typedef PPB_GetInterface PPP_GetInterface_Type;
-
-void __set_real_Pnacl_PPBGetInterface(PPB_GetInterface real);
-void __set_real_Pnacl_PPPGetInterface(PPP_GetInterface_Type real);
-
-const void *__Pnacl_PPBGetInterface(const char *name);
-const void *__Pnacl_PPPGetInterface(const char *name);
-
-struct __PnaclWrapperInfo {
-  const char* iface_macro;
-  const void* wrapped_iface; /* If NULL then it was not wrapped! */
-  const void* real_iface;
-};
-
-#endif  /* PPAPI_GENERATORS_PNACL_SHIM_H_ */