[ash] Create applist button's context menu in its ShelfItemDelegate

ash/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/shelf/shelf_view.h"
 
 #include <algorithm>
 
 #include "ash/ash_constants.h"
 #include "ash/ash_switches.h"
@@ skipping 1809 matching lines @@
            gfx::Point(),
            false,
            ui::GetMenuSourceTypeForEvent(event));
   return true;
 }
 
 void ShelfView::ShowContextMenuForView(views::View* source,
                                        const gfx::Point& point,
                                        ui::MenuSourceType source_type) {
   int view_index = view_model_->GetIndexOfView(source);
-  // TODO(simon.hong81): Create LauncherContextMenu for applist in its
-  // ShelfItemDelegate.
-  if (view_index != -1 && model_->items()[view_index].type == TYPE_APP_LIST) {
-    view_index = -1;
-  }
-
   if (view_index == -1) {
     Shell::GetInstance()->ShowContextMenu(point, source_type);
     return;
   }
+
   scoped_ptr<ui::MenuModel> menu_model;
   ShelfItemDelegate* item_delegate = item_manager_->GetShelfItemDelegate(
       model_->items()[view_index].id);
   menu_model.reset(item_delegate->CreateContextMenu(
       source->GetWidget()->GetNativeView()->GetRootWindow()));
   if (!menu_model)
     return;
 
   base::AutoReset<LauncherID> reseter(
       &context_menu_id_,
@@ skipping 172 matching lines @@
       break;
     case ash::SHELF_ALIGNMENT_TOP:
       distance = coordinate.y() - bounds.bottom();
       break;
   }
   return distance > 0 ? distance : 0;
 }
 
 }  // namespace internal
 }  // namespace ash