We should use UserID object to identify users instead of username.

chromeos/dbus/mock_cryptohome_client.h

 // 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.
 
 #ifndef CHROMEOS_DBUS_MOCK_CRYPTOHOME_CLIENT_H_
 #define CHROMEOS_DBUS_MOCK_CRYPTOHOME_CLIENT_H_
 
 #include <string>
 
 #include "chromeos/dbus/cryptohome/rpc.pb.h"
 #include "chromeos/dbus/cryptohome_client.h"
+#include "components/user_manager/user_id.h"
 #include "testing/gmock/include/gmock/gmock.h"
 
 namespace chromeos {
 
 class MockCryptohomeClient : public CryptohomeClient {
  public:
   MockCryptohomeClient();
   virtual ~MockCryptohomeClient();
 
   MOCK_METHOD1(Init, void(dbus::Bus* bus));
   MOCK_METHOD2(SetAsyncCallStatusHandlers,
                void(const AsyncCallStatusHandler& handler,
                     const AsyncCallStatusWithDataHandler& data_handler));
   MOCK_METHOD0(ResetAsyncCallStatusHandlers, void());
   MOCK_METHOD1(WaitForServiceToBeAvailable,
                void(const WaitForServiceToBeAvailableCallback& callback));
   MOCK_METHOD1(IsMounted, void(const BoolDBusMethodCallback& callback));
   MOCK_METHOD1(Unmount, bool(bool* success));
   MOCK_METHOD3(AsyncCheckKey,
-               void(const std::string& username,
+               void(const user_manager::UserID& user_id,
                     const std::string& key,
                     const AsyncMethodCallback& callback));
   MOCK_METHOD4(AsyncMigrateKey,
-               void(const std::string& username,
+               void(const user_manager::UserID& user_id,
                     const std::string& from_key,
                     const std::string& to_key,
                     const AsyncMethodCallback& callback));
-  MOCK_METHOD2(AsyncRemove, void(const std::string& username,
+  MOCK_METHOD2(AsyncRemove, void(const user_manager::UserID& user_id,
                                  const AsyncMethodCallback& callback));
   MOCK_METHOD1(GetSystemSalt, void(const GetSystemSaltCallback& callback));
   MOCK_METHOD2(GetSanitizedUsername,
-               void(const std::string& username,
+               void(const user_manager::UserID& user_id,
                     const StringDBusMethodCallback& callback));
   MOCK_METHOD1(BlockingGetSanitizedUsername,
-               std::string(const std::string& username));
-  MOCK_METHOD4(AsyncMount, void(const std::string& username,
+               std::string(const user_manager::UserID& user_id));
+  MOCK_METHOD4(AsyncMount, void(const user_manager::UserID& user_id,
                                 const std::string& key,
                                 int flags,
                                 const AsyncMethodCallback& callback));
-  MOCK_METHOD4(AsyncAddKey, void(const std::string& username,
+  MOCK_METHOD4(AsyncAddKey, void(const user_manager::UserID& user_id,
                                  const std::string& key,
                                  const std::string& new_key,
                                  const AsyncMethodCallback& callback));
   MOCK_METHOD1(AsyncMountGuest,
                void(const AsyncMethodCallback& callback));
   MOCK_METHOD3(AsyncMountPublic, void(const std::string& public_mount_id,
                                       int flags,
                                       const AsyncMethodCallback& callback));
   MOCK_METHOD1(TpmIsReady, void(const BoolDBusMethodCallback& callback));
   MOCK_METHOD1(TpmIsEnabled, void(const BoolDBusMethodCallback& callback));
   MOCK_METHOD1(CallTpmIsEnabledAndBlock, bool(bool* enabled));
   MOCK_METHOD1(TpmGetPassword, void(const StringDBusMethodCallback& callback));
   MOCK_METHOD1(TpmIsOwned, void(const BoolDBusMethodCallback& callback));
   MOCK_METHOD1(CallTpmIsOwnedAndBlock, bool(bool* owned));
   MOCK_METHOD1(TpmIsBeingOwned, void(const BoolDBusMethodCallback& callback));
   MOCK_METHOD1(CallTpmIsBeingOwnedAndBlock, bool(bool* owning));
   MOCK_METHOD1(TpmCanAttemptOwnership,
                void(const VoidDBusMethodCallback& callback));
   MOCK_METHOD1(TpmClearStoredPassword,
                void(const VoidDBusMethodCallback& callback));
   MOCK_METHOD0(CallTpmClearStoredPasswordAndBlock, bool());
   MOCK_METHOD1(Pkcs11IsTpmTokenReady,
                void(const BoolDBusMethodCallback& callback));
   MOCK_METHOD1(Pkcs11GetTpmTokenInfo,
                void(const Pkcs11GetTpmTokenInfoCallback& callback));
   MOCK_METHOD2(Pkcs11GetTpmTokenInfoForUser,
-               void(const std::string& username,
+               void(const user_manager::UserID& user_id,
                     const Pkcs11GetTpmTokenInfoCallback& callback));
   MOCK_METHOD3(InstallAttributesGet,
                bool(const std::string& name,
                     std::vector<uint8>* value,
                     bool* successful));
   MOCK_METHOD3(InstallAttributesSet,
                bool(const std::string& name,
                     const std::vector<uint8>& value,
                     bool* successful));
   MOCK_METHOD1(InstallAttributesFinalize, bool(bool* successful));
   MOCK_METHOD1(InstallAttributesIsReady,
                void(const BoolDBusMethodCallback& callback));
   MOCK_METHOD1(InstallAttributesIsInvalid, bool(bool* is_invalid));
   MOCK_METHOD1(InstallAttributesIsFirstInstall, bool(bool* is_first_install));
   MOCK_METHOD1(TpmAttestationIsPrepared,
                void(const BoolDBusMethodCallback& callback));
   MOCK_METHOD1(TpmAttestationIsEnrolled,
                void(const BoolDBusMethodCallback& callback));
   MOCK_METHOD2(AsyncTpmAttestationCreateEnrollRequest,
                void(attestation::PrivacyCAType pca_type,
                     const AsyncMethodCallback& callback));
   MOCK_METHOD3(AsyncTpmAttestationEnroll,
                void(attestation::PrivacyCAType pca_type,
                     const std::string& pca_response,
                     const AsyncMethodCallback& callback));
   MOCK_METHOD5(
       AsyncTpmAttestationCreateCertRequest,
       void(attestation::PrivacyCAType pca_type,
            attestation::AttestationCertificateProfile certificate_profile,
-           const std::string& user_id,
+           const user_manager::UserID& user_id,
            const std::string& request_origin,
            const AsyncMethodCallback& callback));
   MOCK_METHOD5(AsyncTpmAttestationFinishCertRequest,
                void(const std::string& pca_response,
                     attestation::AttestationKeyType key_type,
-                    const std::string& user_id,
+                    const user_manager::UserID& user_id,
                     const std::string& key_name,
                     const AsyncMethodCallback& callback));
   MOCK_METHOD4(TpmAttestationDoesKeyExist,
                void(attestation::AttestationKeyType key_type,
-                    const std::string& user_id,
+                    const user_manager::UserID& user_id,
                     const std::string& key_name,
                     const BoolDBusMethodCallback& callback));
   MOCK_METHOD4(TpmAttestationGetCertificate,
                void(attestation::AttestationKeyType key_type,
-                    const std::string& user_id,
+                    const user_manager::UserID& user_id,
                     const std::string& key_name,
                     const DataMethodCallback& callback));
   MOCK_METHOD4(TpmAttestationGetPublicKey,
                void(attestation::AttestationKeyType key_type,
-                    const std::string& user_id,
+                    const user_manager::UserID& user_id,
                     const std::string& key_name,
                     const DataMethodCallback& callback));
   MOCK_METHOD4(TpmAttestationRegisterKey,
                void(attestation::AttestationKeyType key_type,
-                    const std::string& user_id,
+                    const user_manager::UserID& user_id,
                     const std::string& key_name,
                     const AsyncMethodCallback& callback));
   MOCK_METHOD8(TpmAttestationSignEnterpriseChallenge,
                void(attestation::AttestationKeyType key_type,
-                    const std::string& user_id,
+                    const user_manager::UserID& user_id,
                     const std::string& key_name,
                     const std::string& domain,
                     const std::string& device_id,
                     attestation::AttestationChallengeOptions options,
                     const std::string& challenge,
                     const AsyncMethodCallback& callback));
   MOCK_METHOD5(TpmAttestationSignSimpleChallenge,
                void(attestation::AttestationKeyType key_type,
-                    const std::string& user_id,
+                    const user_manager::UserID& user_id,
                     const std::string& key_name,
                     const std::string& challenge,
                     const AsyncMethodCallback& callback));
   MOCK_METHOD4(TpmAttestationGetKeyPayload,
                void(attestation::AttestationKeyType key_type,
-                    const std::string& user_id,
+                    const user_manager::UserID& user_id,
                     const std::string& key_name,
                     const DataMethodCallback& callback));
   MOCK_METHOD5(TpmAttestationSetKeyPayload,
                void(attestation::AttestationKeyType key_type,
-                    const std::string& user_id,
+                    const user_manager::UserID& user_id,
                     const std::string& key_name,
                     const std::string& payload,
                     const BoolDBusMethodCallback& callback));
   MOCK_METHOD4(TpmAttestationDeleteKeys,
                void(attestation::AttestationKeyType key_type,
-                    const std::string& user_id,
+                    const user_manager::UserID& user_id,
                     const std::string& key_prefix,
                     const BoolDBusMethodCallback& callback));
   MOCK_METHOD4(GetKeyDataEx,
       void(const cryptohome::AccountIdentifier& id,
            const cryptohome::AuthorizationRequest& auth,
            const cryptohome::GetKeyDataRequest& request,
            const ProtobufMethodCallback& callback));
   MOCK_METHOD4(CheckKeyEx,
       void(const cryptohome::AccountIdentifier& id,
            const cryptohome::AuthorizationRequest& auth,
@@ skipping 27 matching lines @@
                     const ProtobufMethodCallback& callback));
   MOCK_METHOD2(
       FlushAndSignBootAttributes,
       void(const cryptohome::FlushAndSignBootAttributesRequest& request,
            const ProtobufMethodCallback& callback));
 };
 
 }  // namespace chromeos
 
 #endif  // CHROMEOS_DBUS_MOCK_CRYPTOHOME_CLIENT_H_