mash: Refactor ChromeLauncherController's ShelfDelegate code.

chrome/browser/ui/ash/launcher/launcher_context_menu.cc

 // Copyright 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 "chrome/browser/ui/ash/launcher/launcher_context_menu.h"
 
 #include <string>
 
 #include "ash/common/shelf/shelf_model.h"
 #include "ash/common/shelf/wm_shelf.h"
@@ skipping 109 matching lines @@
         DCHECK(item_delegate);
         item_delegate->Close();
       } else {
         // TODO(simonhong): Use ShelfItemDelegate::Close().
         controller_->Close(item_.id);
       }
       ash::WmShell::Get()->RecordUserMetricsAction(
           ash::UMA_CLOSE_THROUGH_CONTEXT_MENU);
       break;
     case MENU_PIN:
-      controller_->TogglePinned(item_.id);
+      if (controller_->IsAppPinned(item_.app_launch_id.app_id()))
+        controller_->UnpinAppWithID(item_.app_launch_id.app_id());
+      else
+        controller_->PinAppWithID(item_.app_launch_id.app_id());
       break;
     case MENU_AUTO_HIDE:
       wm_shelf_->SetAutoHideBehavior(
           wm_shelf_->auto_hide_behavior() ==
                   ash::SHELF_AUTO_HIDE_BEHAVIOR_ALWAYS
               ? ash::SHELF_AUTO_HIDE_BEHAVIOR_NEVER
               : ash::SHELF_AUTO_HIDE_BEHAVIOR_ALWAYS);
       break;
     case MENU_ALIGNMENT_MENU:
       break;
@@ skipping 57 matching lines @@
     case MENU_PIN:
     case MENU_AUTO_HIDE:
     case MENU_ALIGNMENT_MENU:
     case MENU_CHANGE_WALLPAPER:
       LauncherContextMenu::ExecuteCommand(command_id, event_flags);
       return true;
     default:
       return false;
   }
 }