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

chrome/browser/ui/cocoa/fullscreen_window_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.
 
 #include "base/mac/scoped_nsobject.h"
-#include "chrome/browser/ui/cocoa/cocoa_test_helper.h"
 #include "chrome/browser/ui/cocoa/fullscreen_window.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"
 
 @interface PerformCloseUIItem : NSObject<NSValidatedUserInterfaceItem>
 @end
 
 @implementation PerformCloseUIItem
 - (SEL)action {
   return @selector(performClose:);
@@ skipping 21 matching lines @@
 
 TEST_F(FullscreenWindowTest, CanPerformClose) {
   base::scoped_nsobject<FullscreenWindow> window;
   window.reset([[FullscreenWindow alloc] init]);
 
   base::scoped_nsobject<PerformCloseUIItem> item;
   item.reset([[PerformCloseUIItem alloc] init]);
 
   EXPECT_TRUE([window validateUserInterfaceItem:item.get()]);
 }