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

chrome/browser/ui/cocoa/bookmarks/bookmark_bar_folder_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/bookmarks/bookmark_bar_folder_window.h"
-#include "chrome/browser/ui/cocoa/cocoa_test_helper.h"
+#include "chrome/browser/ui/cocoa/test/cocoa_test_helper.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "testing/platform_test.h"
 
 class BookmarkBarFolderWindowTest : public CocoaTest {
 };
 
 TEST_F(BookmarkBarFolderWindowTest, Borderless) {
   base::scoped_nsobject<BookmarkBarFolderWindow> window_;
   window_.reset([[BookmarkBarFolderWindow alloc]
                   initWithContentRect:NSMakeRect(0,0,20,20)
@@ skipping 22 matching lines @@
  public:
   BookmarkBarFolderWindowScrollViewTest() {
     scroll_view_.reset([[BookmarkBarFolderWindowScrollView alloc]
                   initWithFrame:NSMakeRect(0, 0, 100, 100)]);
     [[test_window() contentView] addSubview:scroll_view_.get()];
   }
   base::scoped_nsobject<BookmarkBarFolderWindowScrollView> scroll_view_;
 };
 
 TEST_VIEW(BookmarkBarFolderWindowScrollViewTest, scroll_view_);