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 26 matching lines @@
 }
 
 class MetricsProvider;
 class MetricsServiceClient;
 
 class MetricsLog {
  public:
   enum LogType {
     INITIAL_STABILITY_LOG,  // The initial log containing stability stats.
     ONGOING_LOG,            // Subsequent logs in a session.
+    INDEPENDENT_LOG,        // An independent log from a previous session.
   };
 
   // Creates a new metrics log of the specified type.
   // |client_id| is the identifier for this profile on this installation
   // |session_id| is an integer that's incremented on each application launch
   // |client| is used to interact with the embedder.
   // |local_state| is the PrefService that this instance should use.
   // Note: |this| instance does not take ownership of the |client|, but rather
   // stores a weak pointer to it. The caller should ensure that the |client| is
   // valid for the lifetime of this class.
@@ skipping 41 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 a saved system profile and the associated metrics into the log.
+  // Returns true on success. Keep calling it with fresh logs until it returns
+  // false.
+  bool LoadIndependentMetrics(MetricsProvider* metrics_provider);
+
   // 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 83 matching lines @@
   const base::TimeTicks creation_time_;
 
   PrefService* local_state_;
 
   DISALLOW_COPY_AND_ASSIGN(MetricsLog);
 };
 
 }  // namespace metrics
 
 #endif  // COMPONENTS_METRICS_METRICS_LOG_H_