linux_aura: Enable HIDPI support

ui/ui_unittests.gyp

 # Copyright 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 154 matching lines @@
         'base/dragdrop/os_exchange_data_provider_aurax11_unittest.cc',
         'base/gtk/gtk_expanded_container_unittest.cc',
         'base/keycodes/keycode_converter_unittest.cc',
         'base/models/list_model_unittest.cc',
         'base/models/list_selection_model_unittest.cc',
         'base/models/tree_node_model_unittest.cc',
         'base/test/data/resource.h',
         'base/text/bytes_formatting_unittest.cc',
         'base/view_prop_unittest.cc',
         'base/webui/web_ui_util_unittest.cc',
+        'base/x/x11_util_unittest.cc',
         'events/event_dispatcher_unittest.cc',
         'events/event_unittest.cc',
         'events/latency_info_unittest.cc',
         'events/ozone/evdev/key_event_converter_unittest.cc',
         'events/ozone/evdev/touch_event_converter_unittest.cc',
         'gfx/animation/tween_unittest.cc',
         'gfx/blit_unittest.cc',
         'gfx/break_list_unittest.cc',
         'gfx/canvas_unittest.cc',
         'gfx/canvas_unittest_mac.mm',
@@ skipping 191 matching lines @@
           'variables': {
             'test_suite_name': 'ui_unittests',
             'input_shlib_path': '<(SHARED_LIB_DIR)/<(SHARED_LIB_PREFIX)ui_unittests<(SHARED_LIB_SUFFIX)',
           },
           'includes': [ '../build/apk_test.gypi' ],
         },
       ],
     }],
   ],
 }