Send metrics with embedded system profiles after system startup.

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 82 matching lines @@
   // 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<std::unique_ptr<MetricsProvider>>& metrics_providers,
       const std::vector<variations::ActiveGroupId>& synthetic_trials,
       int64_t install_date,
       int64_t metrics_reporting_enabled_date);
 
+  // Loads the environment proto as known to the passed |metrics provider|.
+  // On success, returns true and |app_version| contains the recovered version.
+  // Otherwise (if there was no saved environment or it could not be decoded),
+  // returns false and |app_version| is empty.
+  bool LoadSavedEnvironmentFromProvider(MetricsProvider* metrics_provider,
+                                        std::string* app_version);
+
   // Loads the environment proto that was saved by the last RecordEnvironment()
   // call from prefs. On success, returns true and |app_version| contains the
   // recovered version. Otherwise (if there was no saved environment in prefs
   // or it could not be decoded), returns false and |app_version| is empty.
   bool LoadSavedEnvironmentFromPrefs(std::string* app_version);
 
   // Writes application stability metrics, including stability metrics provided
   // by the specified set of |metrics_providers|. The system profile portion of
   // the log must have already been filled in by a call to RecordEnvironment()
   // or LoadSavedEnvironmentFromPrefs().
@@ skipping 84 matching lines @@
   const base::TimeTicks creation_time_;
 
   PrefService* local_state_;
 
   DISALLOW_COPY_AND_ASSIGN(MetricsLog);
 };
 
 }  // namespace metrics
 
 #endif  // COMPONENTS_METRICS_METRICS_LOG_H_