[ios] Implemented Meta Tags EarlGrey tests.

ios/web/ios_web_shell_tests.gyp

 # Copyright 2016 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': [
     {
@@ skipping 45 matching lines @@
         'OTHER_LDFLAGS': [
           '-Xlinker', '-rpath', '-Xlinker', '@executable_path/Frameworks',
           '-Xlinker', '-rpath', '-Xlinker', '@loader_path/Frameworks'
         ]
       },
       'dependencies': [
         'ios_web_shell_earl_grey_test_support',
         '<(DEPTH)/ios/third_party/earl_grey/earl_grey.gyp:EarlGrey',
       ],
       'sources': [
+        'shell/test/meta_tags_egtest.mm',
         'shell/test/navigation_egtest.mm',
         'shell/test/page_state_egtest.mm',
       ],
       'actions': [{
         'action_name': 'copy_test_data',
         'variables': {
         'test_data_files': [
           '../../ios/web/shell/test/http_server_files',
         ],
         # Files are copied to .app/<test_data_prefix>/<test_data_files>.
@@ skipping 44 matching lines @@
         'shell/test/app/web_view_interaction_test_util.h',
         'shell/test/app/web_view_interaction_test_util.mm',
         'shell/test/earl_grey/shell_base_test_case.h',
         'shell/test/earl_grey/shell_base_test_case.mm',
         'shell/test/earl_grey/shell_matchers.h',
         'shell/test/earl_grey/shell_matchers.mm',
       ],
     },
   ],
 }