iOS: Re-add bits of GTM we actually use.

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 11 matching lines @@
         '../../components/components.gyp:password_manager_core_common',
         '../../components/components.gyp:syncable_prefs_test_support',
         '../../components/components.gyp:update_client',
         '../../components/components.gyp:version_info',
         '../../components/prefs/prefs.gyp:prefs_test_support',
         '../../ios/testing/ios_testing.gyp:ocmock_support',
         '../../net/net.gyp:net_test_support',
         '../../skia/skia.gyp:skia',
         '../../testing/gmock.gyp:gmock',
         '../../testing/gtest.gyp:gtest',
+        '../../third_party/google_toolbox_for_mac/google_toolbox_for_mac.gyp:google_toolbox_for_mac',
         '../../third_party/ocmock/ocmock.gyp:ocmock',
         '../../ui/gfx/gfx.gyp:gfx',
         '../../ui/gfx/gfx.gyp:gfx_test_support',
         '../web/ios_web.gyp:ios_web',
         '../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',
       ],
@@ skipping 41 matching lines @@
         'browser/ui/elements/selector_picker_view_controller_unittest.mm',
         'browser/ui/keyboard/UIKeyCommand+ChromeTest.mm',
         'browser/ui/keyboard/hardware_keyboard_watcher_unittest.mm',
         'browser/ui/native_content_controller_unittest.mm',
         'browser/ui/ui_util_unittest.mm',
         'browser/ui/uikit_ui_util_unittest.mm',
         'browser/update_client/ios_chrome_update_query_params_delegate_unittest.cc',
         'browser/web_resource/web_resource_util_unittest.cc',
         'browser/webp_transcode/webp_decoder_unittest.mm',
         'common/string_util_unittest.mm',
+        'test/google_toolbox_unittest.mm',
       ],
       'actions': [
         {
           'action_name': 'copy_ios_chrome_test_data',
           'variables': {
             'test_data_files': [
               '../../net/data/ssl/certificates/',
               'test/data',
             ],
             'test_data_prefix': 'ios/chrome',
@@ skipping 53 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',
       ],
     },
   ],
 }