ui: Move screen unit test into gfx_unittests target.

This is pretty straightforward, just moving the screen_unittest.cc
entries from ui_unittests.gyp to gfx_tests.gyp. gfx_unittests now has a
TestSuite that setups everything we need to run it.

BUG=331829
TEST=ui_unittests, gfx_unittests
TBR=ben@chromium.org,danakj@chromium.org

Review URL: https://codereview.chromium.org/384263002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@284458 0039d316-1c4b-4281-b951-d872f2087c98

ui/gfx/gfx_tests.gyp

@@ -21,6 +21,7 @@
         'image/image_unittest_util.h',
         'image/image_unittest_util_ios.mm',
         'image/image_unittest_util_mac.mm',
+        'screen_unittest.cc',
         'test/run_all_unittests.cc',
         'text_elider_unittest.cc',
         'text_utils_unittest.cc',
@@ -137,6 +138,11 @@
             'render_text_unittest.cc',
           ],
         }],
+        ['use_aura==1', {
+          'sources!': [
+            'screen_unittest.cc',
+          ],
+        }],
       ],
     }
   ],

ui/ui_unittests.gyp

@@ -41,7 +41,6 @@
         'base/resource/data_pack_unittest.cc',
         'base/resource/resource_bundle_unittest.cc',
         'base/test/run_all_unittests.cc',
-        'gfx/screen_unittest.cc',
       ],
       'all_sources': [
         '<@(_common_sources)',
@@ -203,7 +202,6 @@
         ['use_aura==1', {
           'sources!': [
             'base/dragdrop/os_exchange_data_win_unittest.cc',
-            'gfx/screen_unittest.cc',
           ],
         }],
         ['chromeos==1', {