Remove LauncherItemController::type; use ShelfItems::type.

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

Index: chrome/browser/ui/ash/launcher/arc_app_launcher_browsertest.cc
diff --git a/chrome/browser/ui/ash/launcher/arc_app_launcher_browsertest.cc b/chrome/browser/ui/ash/launcher/arc_app_launcher_browsertest.cc
index 04250addfca05be11fcd3ab3e0ef98a0cb3a989e..d9cf3d1a34fcc7b7a637d529d853cb3477053c11 100644
--- a/chrome/browser/ui/ash/launcher/arc_app_launcher_browsertest.cc
+++ b/chrome/browser/ui/ash/launcher/arc_app_launcher_browsertest.cc
@@ -236,12 +236,7 @@ class ArcAppLauncherBrowserTest : public ExtensionBrowserTest {
     const ash::ShelfID shelf_id = shelf_delegate()->GetShelfIDForAppID(id);
     if (!shelf_id)
       return nullptr;
-    LauncherItemController* controller =
-        chrome_controller()->GetLauncherItemController(shelf_id);
-    if (!controller)
-      return nullptr;
-    DCHECK_EQ(LauncherItemController::TYPE_APP, controller->type());
-    return controller;
+    return chrome_controller()->GetLauncherItemController(shelf_id);
   }
 
   ArcAppListPrefs* app_prefs() { return ArcAppListPrefs::Get(profile()); }