Extract guts of ChromeStabilityMetricsProvider into helper class

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 53 matching lines @@
         'metrics/metrics_service_accessor.cc',
         'metrics/metrics_service_accessor.h',
         'metrics/metrics_service_client.cc',
         'metrics/metrics_service_client.h',
         'metrics/metrics_state_manager.cc',
         'metrics/metrics_state_manager.h',
         'metrics/metrics_switches.cc',
         'metrics/metrics_switches.h',
         'metrics/persisted_logs.cc',
         'metrics/persisted_logs.h',
+        'metrics/stability_metrics_helper.cc',
+        'metrics/stability_metrics_helper.h',
+        'metrics/system_memory_stats_recorder.h',
+        'metrics/system_memory_stats_recorder_linux.cc',
+        'metrics/system_memory_stats_recorder_win.cc',
         'metrics/url_constants.cc',
         'metrics/url_constants.h',
       ],
       'conditions': [
         ['chromeos==1', {
           'dependencies': [
             'metrics_serialization',
           ],
         }],
         ['OS=="win"', {
@@ skipping 141 matching lines @@
             'metrics/profiler/tracking_synchronizer.cc',
             'metrics/profiler/tracking_synchronizer.h',
             'metrics/profiler/tracking_synchronizer_observer.cc',
             'metrics/profiler/tracking_synchronizer_observer.h',
           ],
         },
       ],
     }]
   ],
 }