Implement auto-login for ARC kiosk.

chrome/browser/ui/webui/chromeos/login/gaia_screen_handler.cc

 // Copyright 2013 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 "chrome/browser/ui/webui/chromeos/login/gaia_screen_handler.h"
 
 #include "ash/common/system/chromeos/devicetype_utils.h"
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/guid.h"
@@ skipping 530 matching lines @@
     signin_screen_handler_->RefocusCurrentPod();
 
   frame_error_ = net::OK;
   frame_state_ = FRAME_STATE_LOADED;
 
   if (network_state_informer_->state() == NetworkStateInformer::ONLINE)
     UpdateState(NetworkError::ERROR_REASON_UPDATE);
 
   if (test_expects_complete_login_)
     SubmitLoginFormForTest();
+  if (Delegate())
+    Delegate()->OnSigninScreenReady();

[Alexander Alekseev, 2016/11/17 22:49:33]

This looks strange. Why do you need this?

[Sergey Poromov, 2016/11/17 22:55:34]

This is needed to notify ExistingUserController that signin screen is ready and
it can auto-launch ARC kiosk session.
This is done similar to public session that wait for the same signal, but from
SigninScreenHandler.
The other solution could be to create separate path of notifying
ExistingUserController, but this will produce several intermediate methods.

[Nikita (slow), 2016/11/18 15:12:58]

Why this change?

[Sergey Poromov, 2016/11/18 15:47:26]

Changed to OnGaiaScreenReady as for auto login it should be reported that GAIA
UI is loaded.

 }
 
 void GaiaScreenHandler::DoCompleteLogin(const std::string& gaia_id,
                                         const std::string& typed_email,
                                         const std::string& password,
                                         bool using_saml) {
   if (!Delegate())
     return;
 
   if (using_saml && !using_saml_api_)
@@ skipping 278 matching lines @@
 bool GaiaScreenHandler::IsRestrictiveProxy() const {
   return !disable_restrictive_proxy_check_for_test_ &&
          !IsOnline(captive_portal_status_);
 }
 
 void GaiaScreenHandler::DisableRestrictiveProxyCheckForTest() {
   disable_restrictive_proxy_check_for_test_ = true;
 }
 
 }  // namespace chromeos