Adds web::NavigationItemImpl.

ios/ios_tests_unit.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': [
     {
       'target_name': 'ios_unittests',
       'type': '<(gtest_target_type)',
       'dependencies': [
         '../base/base.gyp:base',
         '../base/base.gyp:run_all_unittests',
         '../base/base.gyp:test_support_base',
         '../testing/gmock.gyp:gmock',
         '../testing/gtest.gyp:gtest',
         'ios_base.gyp:ios_consumer_base',
+        'web/ios_web.gyp:ios_web',
       ],
       'sources': [
         'consumer/base/supports_user_data_unittest.cc',
+        'web/navigation/navigation_item_impl_unittest.mm',
       ],
     },
   ],
 }