Add a Rappor option in the settings page.

chrome/chrome_tests_unit.gypi

 # Copyright 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': {
     'chrome_unit_tests_sources': [
       '../components/autofill/content/renderer/test_password_autofill_agent.cc',
       '../components/autofill/content/renderer/test_password_autofill_agent.h',
       '../components/autofill/content/renderer/test_password_generation_agent.cc',
       '../components/autofill/content/renderer/test_password_generation_agent.h',
@@ skipping 115 matching lines @@
       'browser/install_verification/win/module_verification_test.cc',
       'browser/install_verification/win/module_verification_test.h',
       'browser/internal_auth_unittest.cc',
       'browser/invalidation/invalidator_storage_unittest.cc',
       'browser/io_thread_unittest.cc',
       'browser/logging_chrome_unittest.cc',
       'browser/mac/keystone_glue_unittest.mm',
       'browser/media/native_desktop_media_list_unittest.cc',
       'browser/metrics/chrome_metrics_service_accessor_unittest.cc',
       'browser/metrics/cloned_install_detector_unittest.cc',
+      'browser/metrics/metrics_services_manager_unittest.cc',
       'browser/metrics/rappor/sampling_unittest.cc',
       'browser/metrics/signin_status_metrics_provider_chromeos_unittest.cc',
       'browser/metrics/signin_status_metrics_provider_unittest.cc',
       'browser/metrics/thread_watcher_android_unittest.cc',
       'browser/metrics/thread_watcher_unittest.cc',
       'browser/metrics/time_ticks_experiment_unittest.cc',
       'browser/metrics/variations/generated_resources_map_lookup_unittest.cc',
       'browser/metrics/variations/variations_request_scheduler_mobile_unittest.cc',
       'browser/metrics/variations/variations_request_scheduler_unittest.cc',
       'browser/metrics/variations/variations_seed_store_unittest.cc',
@@ skipping 2587 matching lines @@
               'dependencies': [
                 '../tools/xdisplaycheck/xdisplaycheck.gyp:xdisplaycheck',
               ],
             }],
           ],
         },
       ],
     }],
   ],  # 'conditions'
 }