Implement UMA log throttling for cellular connections

components/metrics.gypi

 # Copyright 2014 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': [
     {
       # GN version: //components/metrics
       'target_name': 'metrics',
       'type': 'static_library',
@@ skipping 28 matching lines @@
         'metrics/drive_metrics_provider_linux.cc',
         'metrics/drive_metrics_provider_mac.mm',
         'metrics/drive_metrics_provider_win.cc',
         'metrics/file_metrics_provider.cc',
         'metrics/file_metrics_provider.h',
         'metrics/histogram_encoder.cc',
         'metrics/histogram_encoder.h',
         'metrics/machine_id_provider.h',
         'metrics/machine_id_provider_stub.cc',
         'metrics/machine_id_provider_win.cc',
+        'metrics/data_use_tracker.cc',
+        'metrics/data_use_tracker.h',
         'metrics/metrics_log.cc',
         'metrics/metrics_log.h',
         'metrics/metrics_log_manager.cc',
         'metrics/metrics_log_manager.h',
         'metrics/metrics_log_uploader.cc',
         'metrics/metrics_log_uploader.h',
         'metrics/metrics_pref_names.cc',
         'metrics/metrics_pref_names.h',
         'metrics/metrics_provider.cc',
         'metrics/metrics_provider.h',
@@ skipping 267 matching lines @@
           ],
           'sources': [
             'metrics/profiler/ios/ios_tracking_synchronizer_delegate.cc',
             'metrics/profiler/ios/ios_tracking_synchronizer_delegate.h',
           ],
         },
       ],
     }],
   ],
 }