Port custom_tabs_client from GYP to GN

build/gn_migration.gypi

 # Copyright (c) 2015 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.
 
 # This file defines five targets that we are using to track the progress of the
 # GYP->GN migration:
 #
 # 'both_gn_and_gyp' lists what GN is currently capable of building and should
 # match the 'both_gn_and_gyp' target in //BUILD.gn.
 #
@@ skipping 339 matching lines @@
             '../tools/gn/gn.gyp:gn_unittests',
             '../ui/app_list/app_list.gyp:app_list_unittests',
             '../url/url.gyp:url_unittests',
           ],
         }],
         ['OS=="android" and chromecast==0', {
           'dependencies': [
             '../chrome/chrome.gyp:chrome_public_apk',
             '../chrome/chrome.gyp:chrome_public_test_apk',
             '../chrome/chrome.gyp:chromedriver_webview_shell_apk',
+            '../third_party/custom_tabs_client/custom_tabs_client.gyp:custom_tabs_client_example_apk',
           ],
         }],
         ['OS=="android" or OS=="linux"', {
           'dependencies': [
             '../net/net.gyp:disk_cache_memory_test',
           ],
         }],
         ['chromeos==1', {
           'dependencies': [
             '../chromeos/chromeos.gyp:chromeos_unittests',
@@ skipping 345 matching lines @@
           'dependencies': [
             # TODO(GYP): All of these targets need to be ported over.
             '../components/components.gyp:policy_win64',
           ]
         }],
       ],
     },
   ]
 }