Eliminate ash::internal namespace

ash/test/shell_test_api.h

Index: ash/test/shell_test_api.h
diff --git a/ash/test/shell_test_api.h b/ash/test/shell_test_api.h
index 12e40b785cb2498c409f1648849692a9b0918989..68c3749f4ddb273309983121aafbf007e6cbcb4a 100644
--- a/ash/test/shell_test_api.h
+++ b/ash/test/shell_test_api.h
@@ -12,20 +12,17 @@ class InputMethodEventFilter;
 }  // namespace wm
 
 namespace ash {
-class AshNativeCursorManager;
-class ShelfDelegate;
-class ShelfModel;
-class Shell;
-
-namespace internal {
 class AppListController;
+class AshNativeCursorManager;
 class DragDropController;
 class MaximizeModeWindowManager;
 class RootWindowLayoutManager;
 class ScreenPositionController;
+class ShelfDelegate;
+class ShelfModel;
+class Shell;
 class SystemGestureEventFilter;
 class WorkspaceController;
-}  // namespace internal
 
 namespace test {
 
@@ -34,16 +31,16 @@ class ShellTestApi {
 public:
   explicit ShellTestApi(Shell* shell);
 
-  internal::RootWindowLayoutManager* root_window_layout();
+  RootWindowLayoutManager* root_window_layout();
   ::wm::InputMethodEventFilter* input_method_event_filter();
-  internal::SystemGestureEventFilter* system_gesture_event_filter();
-  internal::WorkspaceController* workspace_controller();
-  internal::ScreenPositionController* screen_position_controller();
+  SystemGestureEventFilter* system_gesture_event_filter();
+  WorkspaceController* workspace_controller();
+  ScreenPositionController* screen_position_controller();
   AshNativeCursorManager* ash_native_cursor_manager();
   ShelfModel* shelf_model();
-  internal::DragDropController* drag_drop_controller();
-  internal::AppListController* app_list_controller();
-  internal::MaximizeModeWindowManager* maximize_mode_window_manager();
+  DragDropController* drag_drop_controller();
+  AppListController* app_list_controller();
+  MaximizeModeWindowManager* maximize_mode_window_manager();
   void DisableOutputConfiguratorAnimation();
 
   // Set ShelfDelegate.