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

chrome/browser/ui/tests/ui_gfx_image_unittest.mm

 // 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.
 
 #import <AppKit/AppKit.h>
 
 #import "base/mac/mac_util.h"
 #include "base/mac/scoped_nsobject.h"
-#import "chrome/browser/ui/cocoa/cocoa_test_helper.h"
+#import "chrome/browser/ui/cocoa/test/cocoa_test_helper.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "ui/gfx/image/image.h"
 #include "ui/gfx/image/image_unittest_util.h"
 
 namespace {
 
 class UiGfxImageTest : public CocoaTest {
 };
 
@@ skipping 28 matching lines @@
       [[NSImageView alloc] initWithFrame:NSMakeRect(10, 10, 25, 25)]);
   [[test_window() contentView] addSubview:image_view];
   [test_window() orderFront:nil];
 
   gfx::Image image = gfx::Image::CreateFrom1xBitmap(
       gfx::test::CreateBitmap(25, 25));
   [image_view setImage:image.ToNSImage()];
 }
 
 }  // namespace