cros: Enable encryption migration UI by default.

chrome/browser/chromeos/login/existing_user_controller.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 "chrome/browser/chromeos/login/existing_user_controller.h"
 
 #include <memory>
 #include <vector>
 
 #include "base/bind.h"
@@ skipping 161 matching lines @@
              chromeos::switches::kLoginManager) &&
          !session_manager::SessionManager::Get()->IsSessionStarted();
 }
 
 void RecordPasswordChangeFlow(LoginPasswordChangeFlow flow) {
   UMA_HISTOGRAM_ENUMERATION("Login.PasswordChangeFlow", flow,
                             LOGIN_PASSWORD_CHANGE_FLOW_COUNT);
 }
 
 bool ShouldForceDircrypto() {
-  return base::CommandLine::ForCurrentProcess()->HasSwitch(
-             chromeos::switches::kEnableEncryptionMigration) &&
+  return !base::CommandLine::ForCurrentProcess()->HasSwitch(
+             chromeos::switches::kDisableEncryptionMigration) &&
          (arc::IsArcAvailable() || arc::IsArcKioskAvailable());
 }
 
 }  // namespace
 
 // static
 ExistingUserController* ExistingUserController::current_controller_ = nullptr;
 
 ////////////////////////////////////////////////////////////////////////////////
 // ExistingUserController, public:
@@ skipping 1256 matching lines @@
   login_display_->ShowUnrecoverableCrypthomeErrorDialog();
 }
 
 void ExistingUserController::ClearRecordedNames() {
   display_email_.clear();
   display_name_.clear();
   given_name_.clear();
 }
 
 }  // namespace chromeos