Linux sandbox: support build configuration without base test framework

sandbox/linux/sandbox_linux_test_sources.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.
 
 # Tests need to be compiled in the same link unit, so we have to list them
 # in a separate .gypi file.
 {
   'dependencies': [
     'sandbox',
     'sandbox_linux_test_utils',
     'sandbox_services',
     '../base/base.gyp:base',
-    '../base/base.gyp:test_support_base',
     '../testing/gtest.gyp:gtest',
   ],
   'include_dirs': [
     '../..',
   ],
   'sources': [
     'services/proc_util_unittest.cc',
     'services/scoped_process_unittest.cc',
     'services/resource_limits_unittests.cc',
     'services/syscall_wrappers_unittest.cc',
@@ skipping 29 matching lines @@
         'seccomp-bpf/errorcode_unittest.cc',
         'seccomp-bpf/sandbox_bpf_unittest.cc',
         'seccomp-bpf/syscall_unittest.cc',
         'seccomp-bpf/trap_unittest.cc',
       ],
     }],
     [ 'compile_credentials==1', {
       'sources': [
         'integration_tests/namespace_unix_domain_socket_unittest.cc',
         'services/credentials_unittest.cc',
-        'services/namespace_sandbox_unittest.cc',
         'services/namespace_utils_unittest.cc',
       ],
       'dependencies': [
         '../build/linux/system.gyp:libcap'
       ],
+      'conditions': [
+        [ 'use_base_test_suite==1', {
+          'sources': [
+            'services/namespace_sandbox_unittest.cc',
+          ]
+        }]
+      ],
+    }],
+    [ 'use_base_test_suite==1', {
+      'dependencies': [
+        '../base/base.gyp:test_support_base',
+      ],
+      'defines': [
+        'SANDBOX_USES_BASE_TEST_SUITE',
+      ],
     }],
   ],
 }