Add a screen to migrate filesystem encryption from eCryptfs to ext4 crypto.

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"
+#include "base/command_line.h"
 #include "base/files/file_util.h"
 #include "base/location.h"
 #include "base/path_service.h"
 #include "base/single_thread_task_runner.h"
 #include "base/threading/thread_restrictions.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "chromeos/attestation/attestation.pb.h"
 #include "chromeos/chromeos_paths.h"
+#include "chromeos/chromeos_switches.h"
 #include "chromeos/dbus/cryptohome/key.pb.h"
 #include "chromeos/dbus/cryptohome/rpc.pb.h"
 #include "third_party/cros_system_api/dbus/service_constants.h"
 #include "third_party/protobuf/src/google/protobuf/io/coded_stream.h"
 #include "third_party/protobuf/src/google/protobuf/io/zero_copy_stream.h"
 #include "third_party/protobuf/src/google/protobuf/io/zero_copy_stream_impl_lite.h"
 
 namespace chromeos {
 
 namespace {
@@ skipping 487 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)) {
+    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) {
   cryptohome::BaseReply reply;
   ReturnProtobufMethodCallback(reply, callback);
@@ skipping 107 matching lines @@
   callback.Run(async_call_id_);
   if (!async_call_status_data_handler_.is_null()) {
     base::ThreadTaskRunnerHandle::Get()->PostTask(
         FROM_HERE, base::Bind(async_call_status_data_handler_, async_call_id_,
                               true, data));
   }
   ++async_call_id_;
 }
 
 }  // namespace chromeos