Convert //ash from scoped_ptr to std::unique_ptr

ash/shelf/shelf_navigator_unittest.cc

 // Copyright 2013 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.
 
 #include "ash/shelf/shelf_navigator.h"
 
 #include "ash/ash_switches.h"
 #include "ash/shelf/shelf.h"
 #include "ash/shelf/shelf_item_types.h"
 #include "ash/shelf/shelf_model.h"
@@ skipping 46 matching lines @@
       if (focused_item.type == TYPE_PLATFORM_APP) {
         focused_item.status = STATUS_ACTIVE;
         model_->Set(focused_index, focused_item);
       }
     }
   }
 
   const ShelfModel& model() { return *model_.get(); }
 
  private:
-  scoped_ptr<ShelfModel> model_;
+  std::unique_ptr<ShelfModel> model_;
 
   DISALLOW_COPY_AND_ASSIGN(ShelfNavigatorTest);
 };
 
 }  // namespace
 
 TEST_F(ShelfNavigatorTest, BasicCycle) {
   // An app shortcut and three platform apps.
   ShelfItemType types[] = {
     TYPE_APP_SHORTCUT, TYPE_PLATFORM_APP, TYPE_PLATFORM_APP, TYPE_PLATFORM_APP,
@@ skipping 43 matching lines @@
   };
   // Special case: no items are 'STATUS_ACTIVE'.
   SetupMockShelfModel(types, arraysize(types), -1);
 
   // If there are no active status, pick the first running item as a fallback.
   EXPECT_EQ(2, GetNextActivatedItemIndex(model(), CYCLE_FORWARD));
   EXPECT_EQ(2, GetNextActivatedItemIndex(model(), CYCLE_BACKWARD));
 }
 
 }  // namespace ash