Add a flow class to abstract all the details of minting a token for an app.

chrome/chrome_common.gypi

 # 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.
 
 {
   'targets': [
     {
       'target_name': 'common',
       'type': 'static_library',
       'variables': {
@@ skipping 384 matching lines @@
         'common/net/gaia/google_service_auth_error.cc',
         'common/net/gaia/google_service_auth_error.h',
         'common/net/gaia/oauth_request_signer.cc',
         'common/net/gaia/oauth_request_signer.h',
         'common/net/gaia/oauth2_access_token_consumer.h',
         'common/net/gaia/oauth2_access_token_fetcher.cc',
         'common/net/gaia/oauth2_access_token_fetcher.h',
         'common/net/gaia/oauth2_mint_token_consumer.h',
         'common/net/gaia/oauth2_mint_token_fetcher.cc',
         'common/net/gaia/oauth2_mint_token_fetcher.h',
+        'common/net/gaia/oauth2_mint_token_flow.cc',
+        'common/net/gaia/oauth2_mint_token_flow.h',
         'common/net/gaia/oauth2_revocation_consumer.h',
         'common/net/gaia/oauth2_revocation_fetcher.cc',
         'common/net/gaia/oauth2_revocation_fetcher.h',
         'common/net/x509_certificate_model.cc',
         'common/net/x509_certificate_model_nss.cc',
         'common/net/x509_certificate_model_openssl.cc',
         'common/net/x509_certificate_model.h',
       ],
       'dependencies': [
         '<(DEPTH)/base/base.gyp:base',
@@ skipping 61 matching lines @@
         'common/metrics/proto/user_action_event.proto',
       ],
       'variables': {
         'proto_in_dir': 'common/metrics/proto',
         'proto_out_dir': 'chrome/common/metrics/proto',
       },
       'includes': [ '../build/protoc.gypi' ],
     },
   ],
 }