Fix iOS GN build after r379128.

url/url.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,
   },
   'includes': [
     'url_srcs.gypi',
@@ skipping 31 matching lines @@
       'dependencies': [
         '../base/base.gyp:test_support_base',
         '../mojo/mojo_edk.gyp:mojo_common_test_support',
         '../testing/gtest.gyp:gtest',
         '../third_party/icu/icu.gyp:icuuc',
         'url_test_mojom',
         'url_lib',
       ],
       'sources': [
         'gurl_unittest.cc',
-        'mojo/url_gurl_struct_traits_unittest.cc',
         'origin_unittest.cc',
         'run_all_unittests.cc',
         'scheme_host_port_unittest.cc',
         'url_canon_icu_unittest.cc',
         'url_canon_unittest.cc',
         'url_parse_unittest.cc',
         'url_test_utils.h',
         'url_util_unittest.cc',
       ],
+      'conditions': [
+        ['OS!="ios"', {
+          'sources': [
+            'mojo/url_gurl_struct_traits_unittest.cc',
+          ],
+        }],
+      ],
       # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
       'msvs_disabled_warnings': [4267, ],
     },
     {
       'target_name': 'url_interfaces_mojom',
       'type': 'none',
       'variables': {
         'mojom_files': [
           'mojo/url.mojom',
         ],
@@ skipping 126 matching lines @@
             '../build/isolate.gypi',
           ],
           'sources': [
             'url_unittests.isolate',
           ],
         },
       ],
     }],
   ],
 }