NaCl/GYP: remove references to prep_toolchain.

ppapi/native_client/src/untrusted/pnacl_support_extension/pnacl_support_extension.gyp

 # 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.
 
 {
   # re: untrusted.gypi -- Though this doesn't really use build_nexe.py or
   # anything, it depends on untrusted nexes from the toolchain and for the shim.
   'includes': [
     '../../../../../build/common_untrusted.gypi',
   ],
   'targets': [
   {
     'target_name': 'pnacl_support_extension',
     'type': 'none',
     'variables': {
       'pnacl_translator_dir%': "<(DEPTH)/native_client/toolchain/<(TOOLCHAIN_OS)_x86/pnacl_translator",
       'pnacl_translator_stamp%': "pnacl_translator.json",
     },
     'conditions': [
       ['disable_nacl==0 and disable_pnacl==0 and disable_nacl_untrusted==0', {
         'dependencies': [
           '../../../../../ppapi/native_client/src/untrusted/pnacl_irt_shim/pnacl_irt_shim.gyp:browser',
-          '../../../../../native_client/tools.gyp:prep_toolchain',
         ],
         'sources': [
           'pnacl_component_crx_gen.py',
         ],
         # We could use 'copies', but we want to rename the files
         # in a white-listed way first.  Thus use a script.
         'actions': [
           {
             'action_name': 'generate_pnacl_support_extension',
             'inputs': [
@@ skipping 130 matching lines @@
               '--pnacl_package_name=pnacl_newlib',
               # ABI Version Number.
               '1',
             ],
           },
         ],
       }],
     ],
   }],
 }