mash: Prerequisites for removing ShelfDelegate.

ash/shelf/shelf_unittest.cc

Index: ash/shelf/shelf_unittest.cc
diff --git a/ash/shelf/shelf_unittest.cc b/ash/shelf/shelf_unittest.cc
index 3fa1d3c9a1a202f075e978fb20ee76a2c1b8484d..68f11f9434b400dbe11a1c1b8d2f5ef28f376f73 100644
--- a/ash/shelf/shelf_unittest.cc
+++ b/ash/shelf/shelf_unittest.cc
@@ -11,7 +11,6 @@
 #include "ash/shelf/wm_shelf.h"
 #include "ash/test/ash_test_base.h"
 #include "ash/test/shelf_view_test_api.h"
-#include "ash/test/test_shelf_item_delegate.h"
 
 namespace ash {
 
@@ -72,10 +71,6 @@ TEST_F(ShelfTest, CheckHoverAfterMenu) {
   item.status = STATUS_RUNNING;
   int index = shelf_model()->Add(item);
 
-  shelf_model()->SetShelfItemDelegate(
-      shelf_model()->items()[index].id,
-      base::MakeUnique<test::TestShelfItemDelegate>(nullptr));
-
   ASSERT_EQ(++button_count, test_api()->GetButtonCount());
   ShelfButton* button = test_api()->GetButton(index);
   button->AddState(ShelfButton::STATE_HOVERED);