Show small notification icons in notification tray

ash/shelf/shelf_view_unittest.cc

Index: ash/shelf/shelf_view_unittest.cc
diff --git a/ash/shelf/shelf_view_unittest.cc b/ash/shelf/shelf_view_unittest.cc
index 8853ea0a46d63637d9f5abcfa9a055c72b45d61d..9c35307e8e5bfc1b20fb827d06860ca8a187b77a 100644
--- a/ash/shelf/shelf_view_unittest.cc
+++ b/ash/shelf/shelf_view_unittest.cc
@@ -18,6 +18,7 @@
 #include "ash/common/shelf/shelf_model.h"
 #include "ash/common/shelf/shelf_tooltip_manager.h"
 #include "ash/common/shell_window_ids.h"
+#include "ash/common/system/web_notification/web_notification_tray.h"
 #include "ash/common/test/material_design_controller_test_api.h"
 #include "ash/common/wm_shell.h"
 #include "ash/root_window_controller.h"
@@ -317,6 +318,8 @@ class ShelfViewTest : public AshTestBase {
     Shelf* shelf = Shelf::ForPrimaryDisplay();
     shelf_view_ = ShelfTestAPI(shelf).shelf_view();
 
+    WebNotificationTray::DisableAnimationsForTest();
+
     // The bounds should be big enough for 4 buttons + overflow chevron.
     shelf_view_->SetBounds(0, 0, 500, GetShelfConstant(SHELF_SIZE));