cros: Mount the existing eCryptfs vault to start migration.

chromeos/dbus/fake_cryptohome_client.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 "chromeos/dbus/fake_cryptohome_client.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include "base/bind.h"
@@ skipping 515 matching lines @@
 void FakeCryptohomeClient::MountEx(
     const cryptohome::Identification& cryptohome_id,
     const cryptohome::AuthorizationRequest& auth,
     const cryptohome::MountRequest& request,
     const ProtobufMethodCallback& callback) {
   cryptohome::BaseReply reply;
   cryptohome::MountReply* mount =
       reply.MutableExtension(cryptohome::MountReply::reply);
   mount->set_sanitized_username(GetStubSanitizedUsername(cryptohome_id));
   if (base::CommandLine::ForCurrentProcess()->HasSwitch(
-          switches::kTestEncryptionMigrationUI)) {
+          switches::kTestEncryptionMigrationUI) &&
+      !request.to_migrate_from_ecryptfs()) {
     reply.set_error(cryptohome::CRYPTOHOME_ERROR_MOUNT_OLD_ENCRYPTION);
   }
   ReturnProtobufMethodCallback(reply, callback);
 }
 
 void FakeCryptohomeClient::AddKeyEx(
     const cryptohome::Identification& cryptohome_id,
     const cryptohome::AuthorizationRequest& auth,
     const cryptohome::AddKeyRequest& request,
     const ProtobufMethodCallback& callback) {
@@ skipping 157 matching lines @@
   if (!dircrypto_migration_progress_handler_.is_null()) {
     base::ThreadTaskRunnerHandle::Get()->PostTask(
         FROM_HERE, base::Bind(dircrypto_migration_progress_handler_,
                               cryptohome::DIRCRYPTO_MIGRATION_IN_PROGRESS,
                               dircrypto_migration_progress_,
                               kDircryptoMigrationMaxProgress));
   }
 }
 
 }  // namespace chromeos