Metrics log modification to handle external components.

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 79 matching lines @@
   // Records the current operating environment, including metrics provided by
   // the specified set of |metrics_providers|.  Takes the list of installed
   // plugins, Google Update statistics, and synthetic trial IDs as parameters
   // because those can't be obtained synchronously from the UI thread.
   // 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.
   void RecordEnvironment(
       const std::vector<MetricsProvider*>& metrics_providers,
       const std::vector<variations::ActiveGroupId>& synthetic_trials,
-      int64 install_date);
+      int64 install_date,
+      int64 metrics_reporting_enabled_date);
 
   // Loads the environment proto that was saved by the last RecordEnvironment()
   // call from prefs and clears the pref value. Returns true on success or false
   // if there was no saved environment in prefs or it could not be decoded.
   bool LoadSavedEnvironmentFromPrefs();
 
   // 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 32 matching lines @@
 
  protected:
   // Exposed for the sake of mocking/accessing in test code.
 
   // Fills |field_trial_ids| with the list of initialized field trials name and
   // group ids.
   virtual void GetFieldTrialIds(
       std::vector<variations::ActiveGroupId>* field_trial_ids) const;
 
   ChromeUserMetricsExtension* uma_proto() { return &uma_proto_; }
+
+  // Exposed to allow subclass to access to export the uma_proto. Can be used
+  // by external components to export logs to Chrome.
   const ChromeUserMetricsExtension* uma_proto() const {
     return &uma_proto_;
   }
 
  private:
   // Returns true if the environment has already been filled in by a call to
   // RecordEnvironment() or LoadSavedEnvironmentFromPrefs().
   bool HasEnvironment() const;
 
   // Returns true if the stability metrics have already been filled in by a
@@ skipping 29 matching lines @@
   const base::TimeTicks creation_time_;
 
   PrefService* local_state_;
 
   DISALLOW_COPY_AND_ASSIGN(MetricsLog);
 };
 
 }  // namespace metrics
 
 #endif  // COMPONENTS_METRICS_METRICS_LOG_H_