Add GN interactive UI tests.

google_apis/google_apis.gyp

 # Copyright (c) 2012 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,  # Use higher warning level.
   },
   'includes': [
     '../build/win_precompile.gypi',
   ],
   'targets': [
     {
+      # GN version: //google_apis
       'target_name': 'google_apis',
       'type': 'static_library',
       'includes': [
         'determine_use_official_keys.gypi',
       ],
       'dependencies': [
         '../base/base.gyp:base',
         '../base/third_party/dynamic_annotations/dynamic_annotations.gyp:dynamic_annotations',
         '../crypto/crypto.gyp:crypto',
         '../net/net.gyp:net',
@@ skipping 140 matching lines @@
             'drive/gdata_wapi_requests_unittest.cc',
             'drive/gdata_wapi_url_generator_unittest.cc',
             'drive/request_sender_unittest.cc',
             'drive/request_util_unittest.cc',
             'drive/time_util_unittest.cc',
           ],
         }],
       ],
     },
     {
+      # GN version: //google_apis:test_support
       'target_name': 'google_apis_test_support',
       'type': 'static_library',
       'dependencies': [
         '../base/base.gyp:base',
         '../base/base.gyp:test_support_base',
         '../net/net.gyp:net',
         '../net/net.gyp:net_test_support',
       ],
       'export_dependent_settings': [
         '../base/base.gyp:base',
@@ skipping 18 matching lines @@
             'drive/dummy_auth_service.cc',
             'drive/dummy_auth_service.h',
             'drive/test_util.cc',
             'drive/test_util.h',
           ],
         }],
       ],
     },
   ],
 }