Create c/b/ui/cocoa/test and move test files to there

chrome/browser/ui/cocoa/extensions/browser_action_button_interactive_uitest.mm

 // Copyright 2015 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.
 
 #import "chrome/browser/ui/cocoa/extensions/browser_action_button.h"
 
 #import <Cocoa/Cocoa.h>
 
 #include <memory>
 
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/callback_helpers.h"
 #include "base/macros.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "chrome/browser/extensions/extension_action_test_util.h"
 #include "chrome/browser/extensions/extension_browsertest.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/ui/browser_window.h"
 #import "chrome/browser/ui/cocoa/app_menu/app_menu_controller.h"
 #import "chrome/browser/ui/cocoa/browser_window_controller.h"
 #import "chrome/browser/ui/cocoa/extensions/browser_actions_container_view.h"
 #import "chrome/browser/ui/cocoa/extensions/browser_actions_controller.h"
-#import "chrome/browser/ui/cocoa/run_loop_testing.h"
+#import "chrome/browser/ui/cocoa/test/run_loop_testing.h"
 #import "chrome/browser/ui/cocoa/toolbar/toolbar_controller.h"
 #include "chrome/browser/ui/global_error/global_error.h"
 #include "chrome/browser/ui/global_error/global_error_service.h"
 #include "chrome/browser/ui/global_error/global_error_service_factory.h"
 #include "chrome/browser/ui/toolbar/toolbar_actions_bar.h"
 #include "chrome/browser/ui/toolbar/toolbar_actions_model.h"
 #include "chrome/test/base/interactive_test_utils.h"
 #include "extensions/common/feature_switch.h"
 #include "ui/base/cocoa/cocoa_base_utils.h"
 #import "ui/events/test/cocoa_test_event_utils.h"
@@ skipping 605 matching lines @@
   openAndCloseAppMenu(appMenuController());
 
   // Move the extension back to the main bar, so an overflow bar is no longer
   // needed. Then open and close the app menu a couple times.
   // This tests that the menu properly cleans up after itself when an overflow
   // was present, and is no longer (fix for crbug.com/603241).
   model()->SetVisibleIconCount(1);
   openAndCloseAppMenu(appMenuController());
   openAndCloseAppMenu(appMenuController());
 }