Add a fetcher class to fetch an OAuth2 login scope token from ClientLogin credentials.

chrome/chrome_browser.gypi

 # Copyright (c) 2011 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.
 
 {
   'targets': [
     {
       'target_name': 'browser',
       'type': 'static_library',
       'dependencies': [
@@ skipping 1555 matching lines @@
         'browser/net/chrome_url_request_context.h',
         'browser/net/connect_interceptor.cc',
         'browser/net/connect_interceptor.h',
         'browser/net/connection_tester.cc',
         'browser/net/connection_tester.h',
         'browser/net/crl_set_fetcher.cc',
         'browser/net/crl_set_fetcher.h',
         'browser/net/gaia/gaia_oauth_consumer.h',
         'browser/net/gaia/gaia_oauth_fetcher.cc',
         'browser/net/gaia/gaia_oauth_fetcher.h',
+        'browser/net/gaia/oauth2_login_token_consumer.h',
+        'browser/net/gaia/oauth2_login_token_fetcher.cc',
+        'browser/net/gaia/oauth2_login_token_fetcher.h',
         'browser/net/gaia/token_service.cc',
         'browser/net/gaia/token_service.h',
         'browser/net/load_timing_observer.cc',
         'browser/net/load_timing_observer.h',
         'browser/net/net_log_logger.cc',
         'browser/net/net_log_logger.h',
         'browser/net/net_pref_observer.cc',
         'browser/net/net_pref_observer.h',
         'browser/net/network_stats.cc',
         'browser/net/network_stats.h',
@@ skipping 3683 matching lines @@
       'type': 'static_library',
       'sources': [ 'browser/history/in_memory_url_index_cache.proto' ],
       'variables': {
         'proto_in_dir': 'browser/history',
         'proto_out_dir': 'chrome/browser/history',
       },
       'includes': [ '../build/protoc.gypi' ]
     },
   ],
 }