Send metrics with embedded system profiles after system startup.

components/metrics/metrics_log.h

Index: components/metrics/metrics_log.h
diff --git a/components/metrics/metrics_log.h b/components/metrics/metrics_log.h
index 441cfbc26a0e6709aed40e8a63c6d493868e8f07..688a624a841036c5359e6b7308189c572a879909 100644
--- a/components/metrics/metrics_log.h
+++ b/components/metrics/metrics_log.h
@@ -44,6 +44,7 @@ class MetricsLog {
   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.
@@ -105,6 +106,11 @@ class MetricsLog {
       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