Refactor AO2TS to make it easier to componentize.

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',
@@ skipping 85 matching lines @@
         'gaia/oauth2_access_token_fetcher_impl.cc',
         'gaia/oauth2_access_token_fetcher_impl.h',
         'gaia/oauth2_access_token_fetcher_immediate_error.cc',
         'gaia/oauth2_access_token_fetcher_immediate_error.h',
         'gaia/oauth2_api_call_flow.cc',
         'gaia/oauth2_api_call_flow.h',
         'gaia/oauth2_mint_token_flow.cc',
         'gaia/oauth2_mint_token_flow.h',
         'gaia/oauth2_token_service.cc',
         'gaia/oauth2_token_service.h',
+        'gaia/oauth2_token_service_delegate.cc',
+        'gaia/oauth2_token_service_delegate.h',
         'gaia/oauth2_token_service_request.cc',
         'gaia/oauth2_token_service_request.h',
         'gaia/oauth_request_signer.cc',
         'gaia/oauth_request_signer.h',
         'gaia/ubertoken_fetcher.cc',
         'gaia/ubertoken_fetcher.h',
         'google_api_keys.cc',
         'google_api_keys.h',
       ],
       # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
@@ skipping 78 matching lines @@
             'drive/dummy_auth_service.cc',
             'drive/dummy_auth_service.h',
             'drive/test_util.cc',
             'drive/test_util.h',
           ],
         }],
       ],
     },
   ],
 }