arc: Support pinned apps across Arc-enabled and Arc-disabled platforms.

chrome/browser/ui/ash/launcher/chrome_launcher_controller_impl_browsertest.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 "chrome/browser/ui/ash/launcher/chrome_launcher_controller_impl.h"
 
 #include <stddef.h>
 
 #include "ash/common/ash_switches.h"
 #include "ash/common/shelf/shelf_constants.h"
@@ skipping 297 matching lines @@
     // First get app_id.
     const Extension* extension =
         service->GetExtensionById(last_loaded_extension_id(), false);
     const std::string app_id = extension->id();
 
     // Then create a shortcut.
     int item_count = model_->item_count();
     ash::ShelfID shortcut_id = controller_->CreateAppShortcutLauncherItem(
         app_id,
         item_count);
-    controller_->PersistPinnedState();
+    controller_->SyncPinPosition(shortcut_id);
     EXPECT_EQ(++item_count, model_->item_count());
     const ash::ShelfItem& item = *model_->ItemByID(shortcut_id);
     EXPECT_EQ(ash::TYPE_APP_SHORTCUT, item.type);
     return item.id;
   }
 
   void RemoveShortcut(ash::ShelfID id) {
     controller_->Unpin(id);
   }
 
@@ skipping 1966 matching lines @@
   // Close all windows.
   CloseBrowserWindow(browser(), menu1.get(), LauncherContextMenu::MENU_CLOSE);
   EXPECT_EQ(0u, BrowserList::GetInstance()->size());
 
   // Check if "Close" is removed from the context menu.
   std::unique_ptr<LauncherContextMenu> menu2 =
       CreateLauncherContextMenu(ash::TYPE_BROWSER_SHORTCUT);
   ASSERT_FALSE(
       IsItemPresentInMenu(menu2.get(), LauncherContextMenu::MENU_CLOSE));
 }