Replace ShelfItemDelegate::GetTitle() with ShelfItem::title.

ash/common/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/common/shelf/shelf_model.h"
 
 #include <algorithm>
 
 #include "ash/common/shelf/shelf_item_delegate.h"
 #include "ash/common/shelf/shelf_model_observer.h"
@@ skipping 25 matching lines @@
   NOTREACHED() << "Invalid type " << type;
   return 1;
 }
 
 bool CompareByWeight(const ShelfItem& a, const ShelfItem& b) {
   return ShelfItemTypeToWeight(a.type) < ShelfItemTypeToWeight(b.type);
 }
 
 }  // namespace
 
-ShelfModel::ShelfModel() : next_id_(1), status_(STATUS_NORMAL) {}
+ShelfModel::ShelfModel() : next_id_(1) {}
 
 ShelfModel::~ShelfModel() {}
 
 void ShelfModel::DestroyItemDelegates() {
   // Some ShelfItemDelegates access this model in their destructors and hence
   // need early cleanup.
   id_to_item_delegate_map_.clear();
 }
 
 int ShelfModel::Add(const ShelfItem& item) {
@@ skipping 145 matching lines @@
 
   return index;
 }
 
 void ShelfModel::RemoveShelfItemDelegate(ShelfID id) {
   if (id_to_item_delegate_map_.find(id) != id_to_item_delegate_map_.end())
     id_to_item_delegate_map_.erase(id);
 }
 
 }  // namespace ash