[Downloads] Ask DownloadHistory if a download was from history.

chrome/browser/download/download_service.cc

Index: chrome/browser/download/download_service.cc
diff --git a/chrome/browser/download/download_service.cc b/chrome/browser/download/download_service.cc
index 13503dc43f2a79aac29a515affd2b74f96ff723e..6ba1f6249e88326e56bb1595269cfff38307911a 100644
--- a/chrome/browser/download/download_service.cc
+++ b/chrome/browser/download/download_service.cc
@@ -66,8 +66,11 @@ ChromeDownloadManagerDelegate* DownloadService::GetDownloadManagerDelegate() {
   // Pass an empty delegate when constructing the DownloadUIController. The
   // default delegate does all the notifications we need.
   scoped_ptr<DownloadUIController::Delegate> empty_ui_delegate;
-  download_ui_.reset(new DownloadUIController(manager,
-                                              empty_ui_delegate.Pass()));
+  download_ui_.reset(new DownloadUIController(
+      manager,
+      DownloadUIController::NewDownloadFilterFromDownloadHistory(
+          download_history_.get()),
+      empty_ui_delegate.Pass()));
 
   // Include this download manager in the set monitored by the
   // global status updater.