Add new UMA stats to get a handle on Downloads UI Usage

chrome/browser/download/download_history.cc

Index: chrome/browser/download/download_history.cc
diff --git a/chrome/browser/download/download_history.cc b/chrome/browser/download/download_history.cc
index 9ac6c1a60fa1b847dcb66577a870b29252c46592..dde224040ea82a735e03814c0138625fcbd28fa3 100644
--- a/chrome/browser/download/download_history.cc
+++ b/chrome/browser/download/download_history.cc
@@ -94,10 +94,7 @@ void DownloadHistory::UpdateEntry(DownloadItem* download_item) {
   HistoryService* hs = profile_->GetHistoryService(Profile::EXPLICIT_ACCESS);
   if (!hs)
     return;
-
-  hs->UpdateDownload(download_item->received_bytes(),
-                     download_item->state(),
-                     download_item->db_handle());
+  hs->UpdateDownload(download_item->GetPersistentStoreInfo());
 }
 
 void DownloadHistory::UpdateDownloadPath(DownloadItem* download_item,