mash: Remove ChromeLauncherController's |id_to_item_controller_map_|.

ash/common/shelf/shelf_view.cc

 // Copyright (c) 2012 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_view.h"
 
 #include <algorithm>
 #include <memory>
 
 #include "ash/common/ash_constants.h"
@@ skipping 1573 matching lines @@
 void ShelfView::ShelfItemMoved(int start_index, int target_index) {
   view_model_->Move(start_index, target_index);
   // When cancelling a drag due to a shelf item being added, the currently
   // dragged item is moved back to its initial position. AnimateToIdealBounds
   // will be called again when the new item is added to the |view_model_| but
   // at this time the |view_model_| is inconsistent with the |model_|.
   if (!cancelling_drag_model_changed_)
     AnimateToIdealBounds();
 }
 
-void ShelfView::OnSetShelfItemDelegate(ShelfID, ShelfItemDelegate*) {}
-
 void ShelfView::AfterItemSelected(
     const ShelfItem& item,
     views::Button* sender,
     std::unique_ptr<ui::Event> event,
     views::InkDrop* ink_drop,
     ShelfAction action,
     base::Optional<std::vector<mojom::MenuItemPtr>> menu_items) {
   shelf_button_pressed_metric_tracker_.ButtonPressed(*event, sender, action);
 
   // The app list handles its own ink drop effect state changes.
@@ skipping 158 matching lines @@
 
 int ShelfView::CalculateShelfDistance(const gfx::Point& coordinate) const {
   const gfx::Rect bounds = GetBoundsInScreen();
   int distance = wm_shelf_->SelectValueForShelfAlignment(
       bounds.y() - coordinate.y(), coordinate.x() - bounds.right(),
       bounds.x() - coordinate.x());
   return distance > 0 ? distance : 0;
 }
 
 }  // namespace ash