MD Downloads: use <iron-list> to render download items

chrome/browser/ui/webui/downloads_dom_handler.cc

Index: chrome/browser/ui/webui/downloads_dom_handler.cc
diff --git a/chrome/browser/ui/webui/downloads_dom_handler.cc b/chrome/browser/ui/webui/downloads_dom_handler.cc
index 0ce308cf19ff74995a8aad7d3e3e66ebd8139d58..ddac1a467a1f28b70bb1f123f681049fdf7314f4 100644
--- a/chrome/browser/ui/webui/downloads_dom_handler.cc
+++ b/chrome/browser/ui/webui/downloads_dom_handler.cc
@@ -64,7 +64,7 @@ namespace {
 // Maximum number of downloads to show. TODO(glen): Remove this and instead
 // stuff the downloads down the pipe slowly.
 size_t MaxNumberOfDownloads() {
-  return MdDownloadsEnabled() ? 50 : 150;
+  return MdDownloadsEnabled() ? 300 : 150;
 }
 
 enum DownloadsDOMEvent {