ucontext_t support for Android x86.

sandbox/linux/sandbox_linux.gypi

 # 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.
 
 {
   'variables': {
     'conditions': [
       ['OS=="linux"', {
         'compile_suid_client': 1,
       }, {
         'compile_suid_client': 0,
       }],
-      ['((OS=="linux" or (OS=="android" and target_arch=="arm")) and '
-             '(target_arch=="ia32" or target_arch=="x64" or '
-              'target_arch=="arm"))', {
+      ['(OS=="linux" or OS=="android") and (target_arch=="ia32" '
+             'or target_arch=="x64" or target_arch=="arm")', {
         'compile_seccomp_bpf': 1,
       }, {
         'compile_seccomp_bpf': 0,
       }],
     ],
   },
   'target_defaults': {
     'target_conditions': [
       # All linux/ files will automatically be excluded on Android
       # so make sure we re-include them explicitly.
@@ skipping 43 matching lines @@
       'type': '<(gtest_target_type)',
       'dependencies': [
         'sandbox',
         '../testing/gtest.gyp:gtest',
       ],
       'sources': [
         'tests/main.cc',
         'tests/unit_tests.cc',
         'tests/unit_tests.h',
         'services/broker_process_unittest.cc',
+        'services/ucontext_unittest.cc'
       ],
       'include_dirs': [
         '../..',
       ],
       'conditions': [
         [ 'compile_suid_client==1', {
           'sources': [
             'suid/client/setuid_sandbox_client_unittest.cc',
           ],
         }],
@@ skipping 126 matching lines @@
           'input_shlib_path':
               '<(SHARED_LIB_DIR)/<(SHARED_LIB_PREFIX)sandbox_linux_unittests'
               '<(SHARED_LIB_SUFFIX)',
         },
         'includes': [ '../../build/apk_test.gypi' ],
         }
       ],
     }],
   ],
 }