Include only policy definitions that apply to the platfrom in the policy definition list.

chrome/chrome_tests.gypi

 # Copyright (c) 2011 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' : {
     # Variables for js2gtest rules
     'gypv8sh': '../tools/gypv8sh.py',
     'js2gtest': 'test/base/js2gtest.js',
     'js2gtest_out_dir': '<(SHARED_INTERMEDIATE_DIR)/js2gtest',
     'mock_js': 'third_party/mock4js/mock4js.js',
@@ skipping 1451 matching lines @@
         'browser/plugin_prefs_unittest.cc',
         'browser/policy/asynchronous_policy_loader_unittest.cc',
         'browser/policy/asynchronous_policy_provider_unittest.cc',
         'browser/policy/asynchronous_policy_test_base.cc',
         'browser/policy/asynchronous_policy_test_base.h',
         'browser/policy/cloud_policy_controller_unittest.cc',
         'browser/policy/cloud_policy_provider_unittest.cc',
         'browser/policy/cloud_policy_subsystem_unittest.cc',
         'browser/policy/config_dir_policy_provider_unittest.cc',
         'browser/policy/configuration_policy_pref_store_unittest.cc',
+        'browser/policy/configuration_policy_provider_test.cc',
+        'browser/policy/configuration_policy_provider_test.h',
         'browser/policy/configuration_policy_provider_mac_unittest.cc',
         'browser/policy/configuration_policy_provider_win_unittest.cc',
         'browser/policy/configuration_policy_reader_unittest.cc',
         'browser/policy/device_management_backend_mock.cc',
         'browser/policy/device_management_backend_mock.h',
         'browser/policy/device_management_service_unittest.cc',
         'browser/policy/device_policy_cache_unittest.cc',
         'browser/policy/device_token_fetcher_unittest.cc',
         'browser/policy/enterprise_install_attributes_unittest.cc',
         'browser/policy/file_based_policy_provider_unittest.cc',
@@ skipping 2743 matching lines @@
               # Use outputs of this action as inputs for the main target build.
               # Seems as a misnomer but makes this happy on Linux (scons).
               'process_outputs_as_sources': 1,
             },
           ],  # 'actions'
         },
       ]
     }],  # 'coverage!=0'
   ],  # 'conditions'
 }