Metrics log modification to handle external components.

components/metrics/metrics_log_manager.h

Index: components/metrics/metrics_log_manager.h
diff --git a/components/metrics/metrics_log_manager.h b/components/metrics/metrics_log_manager.h
index 7fb28b38e1b4c2f042a6b533c1bc5ad5dfd76ed8..38815b5b94e36008960a423bfc62d0f853cc796a 100644
--- a/components/metrics/metrics_log_manager.h
+++ b/components/metrics/metrics_log_manager.h
@@ -90,10 +90,11 @@ class MetricsLogManager {
   // Loads any unsent logs from persistent storage.
   void LoadPersistedUnsentLogs();
 
- private:
-  // Saves |log_data| as the given type.
+  // Saves |log_data| as the given type. Public to allow to push log created by
+  // external components.
   void StoreLog(const std::string& log_data, MetricsLog::LogType log_type);
 
+ private:
   // Tracks whether unsent logs (if any) have been loaded from the serializer.
   bool unsent_logs_loaded_;