Remove ShelfItemDelegate::IsDraggable; check for app list button.

ash/test/shelf_view_test_api.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef ASH_TEST_SHELF_VIEW_TEST_API_H_
 #define ASH_TEST_SHELF_VIEW_TEST_API_H_
 
-#include "ash/common/shelf/shelf_item_delegate.h"
 #include "ash/common/shelf/shelf_item_types.h"
 #include "base/macros.h"
 
 namespace gfx {
 class Rect;
 class Size;
 }
 
 namespace ui {
 class Event;
 }
 
 namespace views {
 class Button;
 class InkDrop;
+class View;
 }
 
 namespace ash {
 class OverflowBubble;
 class OverflowButton;
 class ShelfButton;
 class ShelfButtonPressedMetricTracker;
 class ShelfDelegate;
 class ShelfTooltipManager;
 class ShelfView;
 
 namespace test {
 
 // Use the api in this class to test ShelfView.
 class ShelfViewTestAPI {
  public:
   explicit ShelfViewTestAPI(ShelfView* shelf_view);
   ~ShelfViewTestAPI();
 
   // Number of icons displayed.
   int GetButtonCount();
 
-  // Retrieve the button at |index|.
+  // Retrieve the button at |index|, doesn't support the app list button.

[James Cook, 2016/12/14 17:41:54]

nit: add // because the app list button is not a ShelfButton.

[msw, 2016/12/14 19:46:50]

Done (but hopefully I'll change that in the future).

   ShelfButton* GetButton(int index);
 
+  // Retrieve the view at |index|.
+  views::View* GetViewAt(int index);
+
   // First visible button index.
   int GetFirstVisibleIndex();
 
   // Last visible button index.
   int GetLastVisibleIndex();
 
   // Gets current/ideal bounds for button at |index|.
   const gfx::Rect& GetBoundsByIndex(int index);
   const gfx::Rect& GetIdealBoundsByIndex(int index);
 
@@ skipping 68 matching lines @@
  private:
   ShelfView* shelf_view_;
 
   DISALLOW_COPY_AND_ASSIGN(ShelfViewTestAPI);
 };
 
 }  // namespace test
 }  // namespace ash
 
 #endif  // ASH_TEST_SHELF_VIEW_TEST_API_H_