Eliminate ash::internal namespace

ash/test/app_list_controller_test_api.h

Index: ash/test/app_list_controller_test_api.h
diff --git a/ash/test/app_list_controller_test_api.h b/ash/test/app_list_controller_test_api.h
index 4064a7706b36539d4bf63d27d276b568bf90fbb1..733264bacb5c3de574a02663d24d35a09404fedd 100644
--- a/ash/test/app_list_controller_test_api.h
+++ b/ash/test/app_list_controller_test_api.h
@@ -13,10 +13,8 @@ class AppsGridView;
 }
 
 namespace ash {
-class Shell;
-namespace internal {
 class AppListController;
-}
+class Shell;
 
 namespace test {
 
@@ -31,7 +29,7 @@ class AppListControllerTestApi {
   app_list::AppListView* view();
 
  private:
-  internal::AppListController* app_list_controller_;  // Not owned.
+  AppListController* app_list_controller_;  // Not owned.
 
   DISALLOW_COPY_AND_ASSIGN(AppListControllerTestApi);
 };