Move image_unittest_util* into gfx_test_support target.

ui/gfx/gfx.gyp

 # Copyright (c) 2013 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.
 
 {
   'variables': {
     'chromium_code': 1,
   },
   'targets': [
     {
@@ skipping 408 matching lines @@
           'sources/': [
             ['include', '^scoped_cg_context_save_gstate_mac\\.h$'],
           ],
         }],
       ],
     },
     {
       'target_name': 'gfx_test_support',
       'type': 'static_library',
       'sources': [
+        'image/image_unittest_util.cc',
+        'image/image_unittest_util.h',
+        'image/image_unittest_util_ios.mm',
+        'image/image_unittest_util_mac.mm',
         'test/fontconfig_util_linux.cc',
         'test/fontconfig_util_linux.h',
         'test/gfx_util.cc',
         'test/gfx_util.h',
         'test/ui_cocoa_test_helper.h',
         'test/ui_cocoa_test_helper.mm',
       ],
       'dependencies': [
         '../../base/base.gyp:base',
         '../../skia/skia.gyp:skia',
@@ skipping 34 matching lines @@
          ],
          'variables': {
            'jni_gen_package': 'ui/gfx',
          },
          'includes': [ '../../build/jni_generator.gypi' ],
        },
      ],
     }],
   ],
 }