Send metrics with embedded system profiles after system startup.

components/metrics/metrics_service.h

Index: components/metrics/metrics_service.h
diff --git a/components/metrics/metrics_service.h b/components/metrics/metrics_service.h
index f95fd6d7f97a182d755d5c1a2e825a83d1cd4daa..102ab72ad3932ec3837bb349f0d34de6c186de31 100644
--- a/components/metrics/metrics_service.h
+++ b/components/metrics/metrics_service.h
@@ -353,6 +353,15 @@ class MetricsService : public base::HistogramFlattener {
   // i.e., histograms with the |kUmaStabilityHistogramFlag| flag set.
   void RecordCurrentStabilityHistograms();
 
+  // Record a single independent profile and assocatied histogram from
+  // metrics providers. If this returns true, one was found and there may
+  // be more.
+  bool PrepareProviderMetricsLog();
+
+  // Records one independent histogram log and then reschedules itself to
+  // check for others. The interval is so as to not adversely impact the UI.
+  void PrepareProviderMetricsTask();
+
   // Sub-service for uploading logs.
   MetricsReportingService reporting_service_;