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

ppapi/native_client/src/untrusted/pnacl_irt_shim/pnacl_shim.c

 /* Copyright (c) 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.
  */
 
 /* NOTE: this is auto-generated from IDL */
-#include "ppapi/generators/pnacl_shim.h"
+#include "ppapi/native_client/src/untrusted/pnacl_irt_shim/pnacl_shim.h"
 
 #include "ppapi/c/ppb.h"
 #include "ppapi/c/dev/ppb_alarms_dev.h"
 #include "ppapi/c/dev/ppb_audio_input_dev.h"
 #include "ppapi/c/dev/ppb_buffer_dev.h"
 #include "ppapi/c/dev/ppb_crypto_dev.h"
 #include "ppapi/c/dev/ppb_cursor_control_dev.h"
 #include "ppapi/c/dev/ppb_device_ref_dev.h"
 #include "ppapi/c/dev/ppb_file_chooser_dev.h"
 #include "ppapi/c/dev/ppb_find_dev.h"
@@ skipping 6091 matching lines @@
     if (NULL == iface) return NULL;
     wrapper->real_iface = iface;
   }
 
   if (wrapper->wrapped_iface) {
     return wrapper->wrapped_iface;
   } else {
     return wrapper->real_iface;
   }
 }