mac: Expose keychain access frequency to Telemetry.

base/base.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.
 
 {
   'target_defaults': {
     'variables': {
       'base_target': 0,
       'base_i18n_target': 0,
     },
@@ skipping 411 matching lines @@
           'observer_list.h',
           'observer_list_threadsafe.h',
           'os_compat_android.cc',
           'os_compat_android.h',
           'os_compat_nacl.cc',
           'os_compat_nacl.h',
           'path_service.cc',
           'path_service.h',
           'pending_task.cc',
           'pending_task.h',
+          'perf_util.cc',
+          'perf_util.h',
           'pickle.cc',
           'pickle.h',
           'port.h',
           'posix/eintr_wrapper.h',
           'posix/global_descriptors.cc',
           'posix/global_descriptors.h',
           'posix/unix_domain_socket_linux.cc',
           'posix/unix_domain_socket_linux.h',
           'power_monitor/power_monitor.cc',
           'power_monitor/power_monitor.h',
@@ skipping 577 matching lines @@
           'i18n/time_formatting.h',
           'i18n/timezone.cc',
           'i18n/timezone.h',
           'i18n/utf8_validator_tables.cc',
           'i18n/utf8_validator_tables.h',
         ],
       }]
     ],
   },
 }