Populate a basic SystemProfileProto in UKM.

components/metrics/metrics_log.h

 // 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.
 
 // This file defines a set of user experience metrics data recorded by
 // the MetricsService.  This is the unit of data that is sent to the server.
 
 #ifndef COMPONENTS_METRICS_METRICS_LOG_H_
 #define COMPONENTS_METRICS_METRICS_LOG_H_
 
@@ skipping 56 matching lines @@
   // January 1, 1970 GMT.
   // The value is used to identify when a new build is run, so that previous
   // reliability stats, from other builds, can be abandoned.
   static int64_t GetBuildTime();
 
   // Convenience function to return the current time at a resolution in seconds.
   // This wraps base::TimeTicks, and hence provides an abstract time that is
   // always incrementing for use in measuring time durations.
   static int64_t GetCurrentTime();
 
+  static void RecordCoreSystemProfile(MetricsServiceClient* client,

[Alexei Svitkine (slow), 2017/01/27 21:11:56]

Nit: Comment.

[rkaplow, 2017/01/27 21:57:36]

Done.

+                                      SystemProfileProto* system_profile);
+
   // Records a user-initiated action.
   void RecordUserAction(const std::string& key);
 
   // Record any changes in a given histogram for transmission.
   void RecordHistogramDelta(const std::string& histogram_name,
                             const base::HistogramSamples& snapshot);
 
+
+  // TODO(rkaplow): I think this can be a little refactored as it currently
+  // records a pretty arbitrary set of things.
   // Records the current operating environment, including metrics provided by
   // the specified set of |metrics_providers|.  Takes the list of synthetic
   // trial IDs as a parameter. A synthetic trial is one that is set up
   // dynamically by code in Chrome. For example, a pref may be mapped to a
   // synthetic trial such that the group is determined by the pref value. The
   // current environment is returned serialized as a string.
   std::string RecordEnvironment(
       const std::vector<MetricsProvider*>& metrics_providers,
       const std::vector<variations::ActiveGroupId>& synthetic_trials,
       int64_t install_date,
@@ skipping 100 matching lines @@
   const base::TimeTicks creation_time_;
 
   PrefService* local_state_;
 
   DISALLOW_COPY_AND_ASSIGN(MetricsLog);
 };
 
 }  // namespace metrics
 
 #endif  // COMPONENTS_METRICS_METRICS_LOG_H_