ash: Remove unnecessary WmShelf::SchedulePaint() method

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 130 matching lines @@
 }
 
 bool Shelf::IsShowingOverflowBubble() const {
   return shelf_view_->IsShowingOverflowBubble();
 }
 
 bool Shelf::IsVisible() const {
   return shelf_view_->visible();
 }
 
-void Shelf::SchedulePaint() {
-  shelf_view_->SchedulePaintForAllButtons();
-}
-
 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