Don't start FRE from the login screen

chrome/browser/chromeos/arc/arc_session_manager_unittest.cc

 // Copyright 2016 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 <memory>
 #include <string>
 #include <tuple>
 #include <vector>
 
 #include "base/bind.h"
@@ skipping 71 matching lines @@
       chromeos::LoginDisplay::Delegate* delegate) override {
     return nullptr;
   }
   gfx::NativeWindow GetNativeWindow() const override { return nullptr; }
   chromeos::OobeUI* GetOobeUI() const override { return nullptr; }
   chromeos::WebUILoginView* GetWebUILoginView() const override {
     return nullptr;
   }
   void BeforeSessionStart() override {}
   void Finalize() override {}
-  void OnCompleteLogin() override {}
   void OpenProxySettings() override {}
   void SetStatusAreaVisible(bool visible) override {}
-  chromeos::AutoEnrollmentController* GetAutoEnrollmentController() override {
-    return nullptr;
-  }
   void StartWizard(chromeos::OobeScreen first_screen) override {}
   chromeos::WizardController* GetWizardController() override { return nullptr; }
   chromeos::AppLaunchController* GetAppLaunchController() override {
     return nullptr;
   }
   void StartUserAdding(const base::Closure& completion_callback) override {}
   void CancelUserAdding() override {}
   void StartSignInScreen(const chromeos::LoginScreenContext& context) override {
   }
   void OnPreferencesChanged() override {}
@@ skipping 702 matching lines @@
     // For managed case we handle closing outside of
     // ArcPlayStoreEnabledPreferenceHandler. So it session turns to STOPPED.
     EXPECT_EQ(ArcSessionManager::State::STOPPED,
               arc_session_manager()->state());
     // Managed user's preference should not be overwritten.
     EXPECT_TRUE(IsArcPlayStoreEnabledForProfile(profile()));
   }
 }
 
 }  // namespace arc