Fix running gn gen for //ui/* targets on iOS.

ui/base/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/ui.gni")
 import("//testing/test.gni")
 
 if (is_android) {
   import("//build/config/android/config.gni")
   import("//build/config/android/rules.gni")
@@ skipping 678 matching lines @@
       "cocoa/nsgraphics_context_additions_unittest.mm",
       "cocoa/nsview_additions_unittest.mm",
       "cocoa/three_part_image_unittest.mm",
       "cocoa/tracking_area_unittest.mm",
       "models/list_model_unittest.cc",
       "models/list_selection_model_unittest.cc",
       "models/tree_node_model_unittest.cc",
       "test/data/resource.h",
       "text/bytes_formatting_unittest.cc",
       "touch/selection_bound_unittest.cc",
-      "view_prop_unittest.cc",
       "webui/web_ui_util_unittest.cc",
     ]
   }
 
   if (build_ime) {
     sources += [
       "ime/candidate_window_unittest.cc",
       "ime/chromeos/character_composer_unittest.cc",
       "ime/chromeos/composition_text_chromeos_unittest.cc",
       "ime/input_method_base_unittest.cc",
@@ skipping 57 matching lines @@
       "/DELAYLOAD:d3d10_1.dll",
     ]
     libs = [
       "d2d1.lib",
       "d3d10_1.lib",
       "imm32.lib",
       "oleacc.lib",
     ]
   }
 
-  if (!is_win || !use_aura) {
-    sources -= [ "view_prop_unittest.cc" ]
+  if (is_win) {
+    sources += [ "view_prop_unittest.cc" ]
   }
 
   if (is_android) {
     apk_deps = [ "//chrome:resources" ]
     isolate_file = "ui_base_unittests.isolate"
   }
 
   if (use_pango) {
     configs += [ "//build/config/linux:pangocairo" ]
   }
@@ skipping 63 matching lines @@
   }
   if (is_mac) {
     data += [ "$root_out_dir/ui_unittests Framework.framework/" ]
 
     if (is_asan && symbol_level == 0) {
       data += [ "$root_out_dir/ui_base_unittests.dSYM/" ]
     }
   }
 }
 # TODO(GYP) Mac (ui_base_tests_bundle)