Implement the new Sync Confirmation dialog on Linux and Windows.

components/signin/core/browser/fake_signin_manager.cc

 // 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.
 
 #include "components/signin/core/browser/fake_signin_manager.h"
 
 #include "base/callback_helpers.h"
 #include "base/prefs/pref_service.h"
 #include "build/build_config.h"
 #include "components/signin/core/browser/account_tracker_service.h"
@@ skipping 24 matching lines @@
     const std::string& refresh_token,
     const std::string& gaia_id,
     const std::string& username,
     const std::string& password,
     const OAuthTokenFetchedCallback& oauth_fetched_callback) {
   set_auth_in_progress(
       account_tracker_service()->SeedAccountInfo(gaia_id, username));
   set_password(password);
   username_ = username;
 
+  PrepareForSignin(SIGNIN_TYPE_WITH_REFRESH_TOKEN, gaia_id, username, password);
+
   if (!oauth_fetched_callback.is_null())
     oauth_fetched_callback.Run(refresh_token);
 }
 
 void FakeSigninManager::CompletePendingSignin() {
   SetAuthenticatedAccountId(GetAccountIdForAuthInProgress());
   set_auth_in_progress(std::string());
   FOR_EACH_OBSERVER(
       SigninManagerBase::Observer, observer_list_,
       GoogleSigninSucceeded(authenticated_account_id_, username_, password_));
@@ skipping 25 matching lines @@
   set_password(std::string());
   const std::string account_id = GetAuthenticatedAccountId();
   const std::string username = GetAuthenticatedAccountInfo().email;
   authenticated_account_id_.clear();
 
   FOR_EACH_OBSERVER(SigninManagerBase::Observer, observer_list_,
                     GoogleSignedOut(account_id, username));
 }
 
 #endif  // !defined (OS_CHROMEOS)