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

chrome/browser/ui/cocoa/tabs/tab_controller_unittest.mm

 // Copyright (c) 2011 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 <Cocoa/Cocoa.h>
 #include <stddef.h>
 
 #include "base/i18n/rtl.h"
 #import "base/mac/scoped_nsobject.h"
 #include "base/macros.h"
 #include "base/message_loop/message_loop.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/test/scoped_feature_list.h"
-#include "chrome/browser/ui/cocoa/cocoa_test_helper.h"
 #include "chrome/browser/ui/cocoa/l10n_util.h"
 #import "chrome/browser/ui/cocoa/tabs/alert_indicator_button_cocoa.h"
 #import "chrome/browser/ui/cocoa/tabs/tab_controller.h"
 #import "chrome/browser/ui/cocoa/tabs/tab_controller_target.h"
 #import "chrome/browser/ui/cocoa/tabs/tab_strip_drag_controller.h"
 #import "chrome/browser/ui/cocoa/tabs/tab_view.h"
+#include "chrome/browser/ui/cocoa/test/cocoa_test_helper.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #import "testing/gtest_mac.h"
 #include "testing/platform_test.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/resources/grit/ui_resources.h"
 
 // Implements the target interface for the tab, which gets sent messages when
 // the tab is clicked on by the user and when its close box is clicked.
 @interface TabControllerTestTarget : NSObject<TabControllerTarget> {
  @private
@@ skipping 572 matching lines @@
 
   CheckLayoutAndVisibilityOfSubviewsForAllStates(true);
 
   base::i18n::SetICUDefaultLocale(old_locale);
   [defaults setBool:oldTextDirection forKey:appleTextDirectionDefaultsKey];
   [defaults setBool:oldRTLWritingDirection
              forKey:forceRTLWritingDirectionDefaultsKey];
 }
 
 }  // namespace