Eliminate ash::internal namespace

ash/wm/workspace_controller_test_helper.cc

 // Copyright (c) 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 "ash/wm/workspace_controller_test_helper.h"
 
 #include "ash/wm/workspace_controller.h"
 #include "ash/wm/workspace/workspace_event_handler_test_helper.h"
 #include "ui/aura/window.h"
 
 namespace ash {
-namespace internal {
 
 WorkspaceControllerTestHelper::WorkspaceControllerTestHelper(
     WorkspaceController* controller)
     : controller_(controller) {
 }
 
 WorkspaceControllerTestHelper::~WorkspaceControllerTestHelper() {
 }
 
 WorkspaceEventHandler* WorkspaceControllerTestHelper::GetEventHandler() {
   return controller_->event_handler_.get();
 }
 
 MultiWindowResizeController*
 WorkspaceControllerTestHelper::GetMultiWindowResizeController() {
   return WorkspaceEventHandlerTestHelper(GetEventHandler()).resize_controller();
 }
 
-}  // namespace internal
 }  // namespace ash