Introduce MetricsServiceClient and ChromeMetricsServiceClient.

chrome/chrome_browser.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.
 
 {
   'targets': [
     {
       'target_name': 'browser',
       'type': 'static_library',
       'variables': { 'enable_wexit_time_destructors': 1, },
@@ skipping 1159 matching lines @@
         'browser/memory_details.cc',
         'browser/memory_details.h',
         'browser/memory_details_android.cc',
         'browser/memory_details_linux.cc',
         'browser/memory_details_mac.cc',
         'browser/memory_details_win.cc',
         'browser/metrics/chrome_browser_main_extra_parts_metrics.cc',
         'browser/metrics/chrome_browser_main_extra_parts_metrics.h',
         'browser/metrics/cloned_install_detector.cc',
         'browser/metrics/cloned_install_detector.h',
+        'browser/metrics/chrome_metrics_service_client.cc',
+        'browser/metrics/chrome_metrics_service_client.h',
         'browser/metrics/compression_utils.cc',
         'browser/metrics/compression_utils.h',
         'browser/metrics/extension_metrics.cc',
         'browser/metrics/extension_metrics.h',
         'browser/metrics/field_trial_synchronizer.cc',
         'browser/metrics/field_trial_synchronizer.h',
         'browser/metrics/machine_id_provider.h',
         'browser/metrics/machine_id_provider_stub.cc',
         'browser/metrics/machine_id_provider_win.cc',
         'browser/metrics/metric_event_duration_details.h',
@@ skipping 2518 matching lines @@
             'package_name': 'org/chromium/chrome/browser',
             'template_deps': ['browser/android/tab_load_status.h'],
           },
           'includes': [ '../build/android/java_cpp_template.gypi' ],
         },
       ],
      },
     ],
   ],
 }