Force encryption migration if the device supports ARC.

chromeos/login/auth/cryptohome_authenticator.cc

 // Copyright 2014 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 "chromeos/login/auth/cryptohome_authenticator.h"
 
 #include <stdint.h>
 
 #include <vector>
 
@@ skipping 156 matching lines @@
   const cryptohome::KeyDefinition auth_key(key->GetSecret(),
                                            std::string(),
                                            cryptohome::PRIV_DEFAULT);
   cryptohome::MountParameters mount(ephemeral);
   if (create_if_nonexistent) {
     mount.create_keys.push_back(cryptohome::KeyDefinition(
         key->GetSecret(),
         kCryptohomeGAIAKeyLabel,
         cryptohome::PRIV_DEFAULT));
   }
+  mount.force_dircrypto_if_available =
+      attempt->user_context.IsForcingDircrypto();
 
   cryptohome::HomedirMethods::GetInstance()->MountEx(
       cryptohome::Identification(attempt->user_context.GetAccountId()),
       cryptohome::Authorization(auth_key), mount,
       base::Bind(&OnMount, attempt, resolver));
 }
 
 // Handle cryptohome migration status.
 void OnCryptohomeRenamed(const base::WeakPtr<AuthAttemptState>& attempt,
                          scoped_refptr<CryptohomeAuthenticator> resolver,
@@ skipping 836 matching lines @@
   Resolve();
 }
 
 void CryptohomeAuthenticator::SetOwnerState(bool owner_check_finished,
                                             bool check_result) {
   owner_is_verified_ = owner_check_finished;
   user_can_login_ = check_result;
 }
 
 }  // namespace chromeos