Remove unused ShelfModelObserver::ShelfStatusChanged()

ash/shelf/shelf_model.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_model.h"
 
 #include <algorithm>
 
 #include "ash/ash_switches.h"
 #include "ash/shelf/shelf_model_observer.h"
@@ skipping 132 matching lines @@
                           CompareByWeight) - items_.begin();
 }
 
 int ShelfModel::FirstPanelIndex() const {
   ShelfItem weight_dummy;
   weight_dummy.type = TYPE_APP_PANEL;
   return std::lower_bound(items_.begin(), items_.end(), weight_dummy,
                           CompareByWeight) - items_.begin();
 }
 
-void ShelfModel::SetStatus(Status status) {
-  if (status_ == status)
-    return;
-
-  status_ = status;
-  FOR_EACH_OBSERVER(ShelfModelObserver, observers_, ShelfStatusChanged());
-}
-
 void ShelfModel::AddObserver(ShelfModelObserver* observer) {
   observers_.AddObserver(observer);
 }
 
 void ShelfModel::RemoveObserver(ShelfModelObserver* observer) {
   observers_.RemoveObserver(observer);
 }
 
 int ShelfModel::ValidateInsertionIndex(ShelfItemType type, int index) const {
   DCHECK(index >= 0 && index <= item_count() + 1);
 
   // Clamp |index| to the allowed range for the type as determined by |weight|.
   ShelfItem weight_dummy;
   weight_dummy.type = type;
   index = std::max(std::lower_bound(items_.begin(), items_.end(), weight_dummy,
                                     CompareByWeight) - items_.begin(),
                    static_cast<ShelfItems::difference_type>(index));
   index = std::min(std::upper_bound(items_.begin(), items_.end(), weight_dummy,
                                     CompareByWeight) - items_.begin(),
                    static_cast<ShelfItems::difference_type>(index));
 
   return index;
 }
 
 }  // namespace ash