Parallelizable download metrics.

content/browser/download/download_stats.h

Index: content/browser/download/download_stats.h
diff --git a/content/browser/download/download_stats.h b/content/browser/download/download_stats.h
index ecd3bdf698bc6555af9601112d9fb1aca8e18ecb..979b2f1f937797eed11087efc4ecaddefd32b1e0 100644
--- a/content/browser/download/download_stats.h
+++ b/content/browser/download/download_stats.h
@@ -287,6 +287,12 @@ void RecordParallelizableDownloadStats(
     base::TimeDelta time_without_parallel_streams,
     bool uses_parallel_requests);
 
+// Records the average bandwidth, time for parallelizable download.
+// Also add file size suffix to bucket the metrics with file size.
+CONTENT_EXPORT void RecordParallelizableDownloadAverageStats(
+    int64_t bytes_downloaded,
+    const base::TimeDelta& time_span);
+
 // Records the parallel download creation counts and the reasons why the
 // download falls back to non-parallel download.
 void RecordParallelDownloadCreationEvent(ParallelDownloadCreationEvent event);