Suppress flaky DownloadShelfControllerTest.AddAndRemoveWithActiveItem.

TBR=qinmin@chromium.org

Bug: 832389
Change-Id: I3ba544b2413a6ce30038e60ae314a11abbab7bf6
Reviewed-on: https://chromium-review.googlesource.com/1011662Reviewed-by: Kevin Marshall <kmarshall@chromium.org>
Reviewed-by: Min Qin <qinmin@chromium.org>
Commit-Queue: Kevin Marshall <kmarshall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#552095}

chrome/browser/ui/cocoa/download/download_shelf_controller_unittest.mm

@@ -185,7 +185,9 @@ TEST_F(DownloadShelfControllerTest, AddAndRemoveDownload) {
 
 // Test that the shelf doesn't close automatically after a removal if there are
 // active download items still on the shelf.
-TEST_F(DownloadShelfControllerTest, AddAndRemoveWithActiveItem) {
+// Disabled due to flakiness. https://crbug.com/832389
+#define MAYBE_AddAndRemoveWithActiveItem DISABLED_AddAndRemoveWithActiveItem
+TEST_F(DownloadShelfControllerTest, MAYBE_AddAndRemoveWithActiveItem) {
   base::scoped_nsobject<DownloadItemController> item1(CreateItemController());
   base::scoped_nsobject<DownloadItemController> item2(CreateItemController());
   [shelf_ showDownloadShelf:YES isUserAction:NO animate:YES];