ash: Remove unnecessary utility methods from ash::Shelf

ash/shelf/shelf.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.h"
 
 #include <algorithm>
 #include <cmath>
 
 #include "ash/aura/wm_window_aura.h"
@@ skipping 118 matching lines @@
   item_delegate->ItemSelected(event);
 }
 
 void Shelf::CycleWindowLinear(CycleDirection direction) {
   int item_index =
       GetNextActivatedItemIndex(*WmShell::Get()->shelf_model(), direction);
   if (item_index >= 0)
     ActivateShelfItem(item_index);
 }
 
-bool Shelf::IsShowingMenu() const {
-  return shelf_view_->IsShowingMenu();
-}
-
-bool Shelf::IsShowingOverflowBubble() const {
-  return shelf_view_->IsShowingOverflowBubble();
-}
-
-bool Shelf::IsVisible() const {
-  return shelf_view_->visible();
-}
-
 AppListButton* Shelf::GetAppListButton() const {
   return shelf_view_->GetAppListButton();
 }
 
 void Shelf::LaunchAppIndexAt(int item_index) {
   ShelfModel* shelf_model = WmShell::Get()->shelf_model();
   const ShelfItems& items = shelf_model->items();
   int item_count = shelf_model->item_count();
   int indexes_left = item_index >= 0 ? item_index : item_count;
   int found_index = -1;
@@ skipping 22 matching lines @@
 
 app_list::ApplicationDragAndDropHost* Shelf::GetDragAndDropHostForAppList() {
   return shelf_view_;
 }
 
 void Shelf::UpdateShelfItemBackground(int alpha) {
   shelf_view_->UpdateShelfItemBackground(alpha);
 }
 
 }  // namespace ash