Enable more tests in GN build.

ui/views/BUILD.gn

 # Copyright 2014 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("//build/config/features.gni")
 import("//build/config/ui.gni")
 
 gypi_values = exec_script(
     "//build/gypi_to_gn.py",
     [ rebase_path("views.gyp") ],
@@ skipping 79 matching lines @@
       "//build/config/linux:xrandr",
     ]
     deps += [
       "//ui/events/platform/x11",
     ]
   }
 
   if (use_aura) {
     sources += gypi_values.views_aura_sources
     if (!is_chromeos) {
+      sources += gypi_values.views_desktop_aura_sources
       if (use_x11) {
         sources += gypi_values.views_desktop_aura_x11_sources
       } else if (is_win) {
         sources += gypi_values.views_desktop_aura_win_sources
       } else if (use_ozone) {
         sources += gypi_values.views_desktop_aura_ozone_sources
       }
     }
   }
 }
@@ skipping 145 matching lines @@
       "//ui/compositor",
       "//ui/resources",
       "//ui/resources:ui_test_pak",
       "//ui/string",
       "//ui/wm",
     ]
   }
 }
 
 }  # if false