Extract OAuth2AccessTokenFetcher interface.

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 100 matching lines @@
         'gaia/gaia_switches.h',
         'gaia/gaia_urls.cc',
         'gaia/gaia_urls.h',
         'gaia/google_service_auth_error.cc',
         'gaia/google_service_auth_error.h',
         'gaia/merge_session_helper.cc',
         'gaia/merge_session_helper.h',
         'gaia/oauth_request_signer.cc',
         'gaia/oauth_request_signer.h',
         'gaia/oauth2_access_token_consumer.h',
+        'gaia/oauth2_access_token_fetcher.h',
         'gaia/oauth2_access_token_fetcher.cc',
-        'gaia/oauth2_access_token_fetcher.h',
+        'gaia/oauth2_access_token_fetcher_impl.cc',
+        'gaia/oauth2_access_token_fetcher_impl.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/ubertoken_fetcher.cc',
         'gaia/ubertoken_fetcher.h',
         'google_api_keys.cc',
         'google_api_keys.h',
@@ skipping 30 matching lines @@
         'drive/gdata_wapi_url_generator_unittest.cc',
         'drive/request_sender_unittest.cc',
         'drive/request_util_unittest.cc',
         'drive/time_util_unittest.cc',
         'gaia/gaia_auth_fetcher_unittest.cc',
         'gaia/gaia_auth_util_unittest.cc',
         'gaia/gaia_oauth_client_unittest.cc',
         'gaia/google_service_auth_error_unittest.cc',
         'gaia/merge_session_helper_unittest.cc',
         'gaia/oauth_request_signer_unittest.cc',
-        'gaia/oauth2_access_token_fetcher_unittest.cc',
+        'gaia/oauth2_access_token_fetcher_impl_unittest.cc',
         'gaia/oauth2_api_call_flow_unittest.cc',
         'gaia/oauth2_mint_token_flow_unittest.cc',
         'gaia/oauth2_token_service_unittest.cc',
         'gaia/ubertoken_fetcher_unittest.cc',
       ],
       'conditions': [
         ['OS=="android"', {
           'sources!': [
             'drive/base_requests_server_unittest.cc',
             'drive/drive_api_parser_unittest.cc',
@@ skipping 28 matching lines @@
         'gaia/fake_gaia.h',
         'gaia/fake_oauth2_token_service.cc',
         'gaia/fake_oauth2_token_service.h',
         'gaia/mock_url_fetcher_factory.h',
         'gaia/oauth2_token_service_test_util.cc',
         'gaia/oauth2_token_service_test_util.h',
       ],
     },
   ],
 }