NaCl/GYP: remove references to prep_toolchain.

content/content_nacl_nonsfi.gyp

 # Copyright 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.
 
 {
   'variables': {
     'chromium_code': 1,
   },
   'includes': [
     '../build/common_untrusted.gypi',
@@ skipping 14 matching lines @@
             'build_nonsfi_helper': 1,
 
             'sources': [
               'common/send_zygote_child_ping_linux.cc',
               'public/common/content_switches.cc',
               # TODO(hidehiko): Add sandbox code.
             ],
           },
           'dependencies': [
             '../base/base_nacl.gyp:base_nacl_nonsfi',
-            '../native_client/tools.gyp:prep_toolchain',
           ],
         },
       ],
     }],
   ],
 }