Add support for coverage=1 builds on iOS

sync/sync.gyp

 # Copyright (c) 2012 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': [
     # The core sync library.
@@ skipping 620 matching lines @@
           'syncable/syncable_id_unittest.cc',
           'syncable/syncable_unittest.cc',
           'util/cryptographer_unittest.cc',
           'util/data_encryption_win_unittest.cc',
           'util/data_type_histogram_unittest.cc',
           'util/get_session_name_unittest.cc',
           'util/nigori_unittest.cc',
           'util/protobuf_unittest.cc',
           'internal_api/public/util/weak_handle_unittest.cc',
         ],
+        'conditions': [
+          ['OS == "ios" and coverage != 0', {
+            # These sources can't be built with coverage due to a toolchain
+            # bug: http://openradar.appspot.com/radar?id=1499403
+            'sources!': [
+              'engine/syncer_unittest.cc',
+            ],
+          }],
+        ],
       },
     },
 
     # Unit tests for the 'sync_notifier' target.  This cannot be a static
     # library because the unit test files have to be compiled directly
     # into the executable, so we push the target files to the
     # depending executable target via direct_dependent_settings.
     {
       'target_name': 'sync_notifier_tests',
       'type': 'none',
@@ skipping 241 matching lines @@
           'variables': {
             'test_suite_name': 'sync_unit_tests',
             'input_shlib_path': '<(SHARED_LIB_DIR)/<(SHARED_LIB_PREFIX)sync_unit_tests<(SHARED_LIB_SUFFIX)',
           },
           'includes': [ '../build/apk_test.gypi' ],
         },
       ],
     }],
   ],
 }