Fix the build errors for the OSS build.

* Follow-up to cl/565289223 and cl/569088755.

PiperOrigin-RevId: 569547801

src/spelling/BUILD.bazel

@@ -105,7 +105,6 @@ mozc_cc_library(
         "//protocol:commands_cc_proto",
         "//protocol:engine_builder_cc_proto",
         "@com_google_absl//absl/algorithm:container",
-        "@com_google_absl//absl/base:no_destructor",
         "@com_google_absl//absl/container:flat_hash_set",
         "@com_google_absl//absl/status",
         "@com_google_absl//absl/strings",
@@ -130,6 +129,33 @@ mozc_cc_binary(
         ":spellchecker_service_interface",
         ":spellchecker_service_registration",
         "//protocol:commands_cc_proto",
+        "//protocol:engine_builder_cc_proto",
+        "@com_google_absl//absl/flags:flag",
+        "@com_google_absl//absl/strings",
+    ],
+)
+
+mozc_cc_test(
+    name = "spellchecker_service_test",
+    size = "small",
+    srcs = ["spellchecker_service_test.cc"],
+    tags = [
+        "nomac",
+        "nowin",
+    ],
+    target_compatible_with = mozc_select(
+        default = [],
+        macos = ["@platforms//:incompatible"],
+        windows = ["@platforms//:incompatible"],
+    ),
+    deps = [
+        ":spellchecker_service",
+        "//base:file_stream",
+        "//base:file_util",
+        "//base:file_util_mock",
+        "//base:util",
+        "//converter:segments",
+        "//protocol:commands_cc_proto",
         "//testing:gunit_main",
         "@com_google_absl//absl/status",
         "@com_google_absl//absl/strings",