sandbox/linux/bpf_dsl: remove ErrorCode intermediary representation

sandbox/linux/sandbox_linux_nacl_nonsfi.gyp

 # Copyright 2015 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 11 matching lines @@
             'build_newlib': 0,
             'build_irt': 0,
             'build_pnacl_newlib': 0,
             'build_nonsfi_helper': 1,
 
             'sources': [
               # This is the subset of linux build target, needed for
               # nacl_helper_nonsfi's sandbox implementation.
               'bpf_dsl/bpf_dsl.cc',
               'bpf_dsl/codegen.cc',
-              'bpf_dsl/errorcode.cc',
               'bpf_dsl/policy.cc',
               'bpf_dsl/policy_compiler.cc',
               'bpf_dsl/syscall_set.cc',
               'seccomp-bpf-helpers/sigsys_handlers.cc',
               'seccomp-bpf-helpers/syscall_parameters_restrictions.cc',
               'seccomp-bpf/die.cc',
               'seccomp-bpf/sandbox_bpf.cc',
               'seccomp-bpf/syscall.cc',
               'seccomp-bpf/trap.cc',
               'services/credentials.cc',
@@ skipping 34 matching lines @@
             ],
           },
           'dependencies': [
             '../../testing/gtest_nacl.gyp:gtest_nacl',
           ],
         },
       ],
     }],
   ],
 }