Create Memory Helper for memory warnings

ios/chrome/ios_chrome_tests.gyp

 # 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.
 {
   'variables': {
     'chromium_code': 1,
   },
   'targets': [
     {
       # GN version: //ios/chrome:ios_chrome_unittests
@@ skipping 24 matching lines @@
         '../web/ios_web.gyp:ios_web_test_support',
         'ios_chrome.gyp:ios_chrome_app',
         'ios_chrome.gyp:ios_chrome_browser',
         'ios_chrome.gyp:ios_chrome_common',
         'ios_chrome_test_support',
       ],
       'mac_bundle_resources': [
         'browser/ui/native_content_controller_test.xib'
       ],
       'sources': [
+        'app/application_delegate/memory_warning_helper_unittest.mm',
         'app/safe_mode_util_unittest.cc',
         'browser/chrome_url_util_unittest.mm',
         'browser/crash_loop_detection_util_unittest.mm',
         'browser/favicon/large_icon_cache_unittest.cc',
         'browser/geolocation/CLLocation+XGeoHeaderTest.mm',
         'browser/geolocation/location_manager_unittest.mm',
         'browser/geolocation/omnibox_geolocation_local_state_unittest.mm',
         'browser/install_time_util_unittest.mm',
         'browser/installation_notifier_unittest.mm',
         'browser/metrics/ios_chrome_metrics_service_accessor_unittest.cc',
@@ skipping 89 matching lines @@
         'test/ios_chrome_scoped_testing_local_state.h',
         'test/ios_chrome_unit_test_suite.h',
         'test/ios_chrome_unit_test_suite.mm',
         'test/run_all_unittests.cc',
         'test/testing_application_context.h',
         'test/testing_application_context.mm',
       ],
     },
   ],
 }