Add Digital Asset Links verification for postMessage API

chrome/test/BUILD.gn

 # 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.
 
 import("//build/config/chrome_build.gni")
 import("//build/config/compiler/compiler.gni")
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//chrome/common/features.gni")
@@ skipping 3056 matching lines @@
     "../browser/android/bookmarks/partner_bookmarks_shim_unittest.cc",
     "../browser/android/compositor/layer/tab_layer_unittest.cc",
     "../browser/android/contextualsearch/contextual_search_delegate_unittest.cc",
     "../browser/android/contextualsearch/contextual_search_field_trial_unittest.cc",
     "../browser/android/data_usage/data_use_matcher_unittest.cc",
     "../browser/android/data_usage/data_use_tab_model_unittest.cc",
     "../browser/android/data_usage/data_use_ui_tab_model_unittest.cc",
     "../browser/android/data_usage/external_data_use_observer_unittest.cc",
     "../browser/android/data_usage/external_data_use_reporter_unittest.cc",
     "../browser/android/data_usage/tab_data_use_entry_unittest.cc",
+    "../browser/android/digital_asset_links/digital_asset_links_handler_unittest.cc",
     "../browser/android/download/download_manager_service_unittest.cc",
     "../browser/android/history_report/data_observer_unittest.cc",
     "../browser/android/history_report/delta_file_backend_leveldb_unittest.cc",
     "../browser/android/history_report/delta_file_commons_unittest.cc",
     "../browser/android/history_report/usage_reports_buffer_backend_unittest.cc",
     "../browser/android/locale/special_locale_handler_unittest.cc",
 
     # TODO(newt): move this to test_support_unit?
     "../browser/android/chrome_backup_agent_unittest.cc",
     "../browser/android/favicon_helper_unittest.cc",
@@ skipping 2155 matching lines @@
 }
 
 if (is_win) {
   loadable_module("conflicts_dll") {
     testonly = true
     sources = [
       "conflicts/conflicts_dll.cc",
     ]
   }
 }