message: Remove _or and ValueOrDies from jwt_mac key manager.
diff: @@ -56,15 +56,15 @@ util::StatusOr<std::unique_ptr<JwtMacInternal>> CreateJwtMac() {
  &key_value)) {
  return util::Status(util::error::INVALID_ARGUMENT, "failed to parse key");
  }
  - crypto::tink::util::StatusOr<std::unique_ptr<Mac>> mac_or =
  + crypto::tink::util::StatusOr<std::unique_ptr<Mac>> mac =
  subtle::HmacBoringSsl::New(
  util::Enums::ProtoToSubtle(google::crypto::tink::HashType::SHA256),
  32, util::SecretDataFromStringView(key_value));
  - if (!mac_or.ok()) {
  - return mac_or.status();
  + if (!mac.ok()) {
  + return mac.status();
  }
  - std::unique_ptr<JwtMacInternal> jwt_mac = absl::make_unique<JwtMacImpl>(
  - std::move(mac_or.ValueOrDie()), "HS256", absl::nullopt);
  + std::unique_ptr<JwtMacInternal> jwt_mac =
  + absl::make_unique<JwtMacImpl>(*std::move(mac), "HS256", absl::nullopt);
  return jwt_mac;
  }
  @@ -142,7 +142,7 @@ TEST(JwtMacImplTest, CreateAndValidateTokenWithKid) {
  util::StatusOr<google::protobuf::Struct> header =
  JsonStringToProtoStruct(json_header);
  ASSERT_THAT(header.status(), IsOk());
  - EXPECT_THAT((*header).fields().find("kid")->second.string_value(),
  + EXPECT_THAT(header->fields().find("kid")->second.string_value(),
  Eq("kid-123"));
  }
  