Revert "Added support for NaCl IO to use the IRT Extension API."

native_client_sdk/src/build_tools/build_sdk.py

 #!/usr/bin/env python
 # Copyright (c) 2012 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.
 
 """Entry point for both build and try bots.
 
 This script is invoked from XXX, usually without arguments
 to package an SDK. It automatically determines whether
 this SDK is for mac, win, linux.
@@ skipping 244 matching lines @@
 
 # List of toolchain headers to install.
 # Source is relative to top of Chromium tree, destination is relative
 # to the toolchain header directory.
 NACL_HEADER_MAP = {
   'newlib': [
       ('native_client/src/include/nacl/nacl_exception.h', 'nacl/'),
       ('native_client/src/include/nacl/nacl_minidump.h', 'nacl/'),
       ('native_client/src/untrusted/irt/irt.h', ''),
       ('native_client/src/untrusted/irt/irt_dev.h', ''),
-      ('native_client/src/untrusted/irt/irt_extension.h', ''),
       ('native_client/src/untrusted/nacl/nacl_dyncode.h', 'nacl/'),
       ('native_client/src/untrusted/nacl/nacl_startup.h', 'nacl/'),
       ('native_client/src/untrusted/pthread/pthread.h', ''),
       ('native_client/src/untrusted/pthread/semaphore.h', ''),
       ('native_client/src/untrusted/valgrind/dynamic_annotations.h', 'nacl/'),
       ('ppapi/nacl_irt/public/irt_ppapi.h', ''),
   ],
   'glibc': [
       ('native_client/src/include/nacl/nacl_exception.h', 'nacl/'),
       ('native_client/src/include/nacl/nacl_minidump.h', 'nacl/'),
@@ skipping 829 matching lines @@
     BuildStepArchiveSDKTools()
 
   return 0
 
 
 if __name__ == '__main__':
   try:
     sys.exit(main(sys.argv[1:]))
   except KeyboardInterrupt:
     buildbot_common.ErrorExit('build_sdk: interrupted')