Convert //ash from scoped_ptr to std::unique_ptr

ash/shelf/shelf_item_delegate_manager.h

Index: ash/shelf/shelf_item_delegate_manager.h
diff --git a/ash/shelf/shelf_item_delegate_manager.h b/ash/shelf/shelf_item_delegate_manager.h
index 054e135120abf63cdb6e7a784a13f8c55e49be7c..3fb52edc3832281326677ed217fc21fb12076f8d 100644
--- a/ash/shelf/shelf_item_delegate_manager.h
+++ b/ash/shelf/shelf_item_delegate_manager.h
@@ -6,13 +6,13 @@
 #define ASH_SHELF_SHELF_ITEM_DELEGATE_MANAGER_H_
 
 #include <map>
+#include <memory>
 
 #include "ash/ash_export.h"
 #include "ash/shelf/shelf_item_types.h"
 #include "ash/shelf/shelf_model_observer.h"
 #include "base/compiler_specific.h"
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 #include "base/observer_list.h"
 
 namespace ash {
@@ -51,7 +51,7 @@ class ASH_EXPORT ShelfItemDelegateManager : public ShelfModelObserver {
 
   // Set |item_delegate| for |id| and take an ownership.
   void SetShelfItemDelegate(ShelfID id,
-                            scoped_ptr<ShelfItemDelegate> item_delegate);
+                            std::unique_ptr<ShelfItemDelegate> item_delegate);
 
   // Returns ShelfItemDelegate for |item_type|. Always returns non-NULL.
   ShelfItemDelegate* GetShelfItemDelegate(ShelfID id);