Use defaultPassthroughServiceImplementation.

Bug: 32279541
Bug: 32282345

Test: mma
Change-Id: Ic0222963c99bea41de7637e5f20c19d7c541cb97
diff --git a/light/2.0/default/service.cpp b/light/2.0/default/service.cpp
index e446878..b3848e9 100644
--- a/light/2.0/default/service.cpp
+++ b/light/2.0/default/service.cpp
@@ -1,46 +1,27 @@
-#define LOG_TAG "android.hardware.light@2.0-service"
-#include <utils/Log.h>
+/*
+ * Copyright 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 
-#include <iostream>
-#include <unistd.h>
+#define LOG_TAG "android.hardware.light@2.0-service"
 
 #include <android/hardware/light/2.0/ILight.h>
+#include <hidl/LegacySupport.h>
 
-#include <hidl/IServiceManager.h>
-#include <hwbinder/IPCThreadState.h>
-#include <hwbinder/ProcessState.h>
-#include <utils/Errors.h>
-#include <utils/StrongPointer.h>
-
-using android::sp;
-
-// libhwbinder:
-using android::hardware::IPCThreadState;
-using android::hardware::ProcessState;
-
-// Generated HIDL files
 using android::hardware::light::V2_0::ILight;
+using android::hardware::defaultPassthroughServiceImplementation;
 
 int main() {
-    ALOGI("Service is starting.");
-    const char instance[] = "light";
-    ALOGI("Retrieving default implementation of instance %s.",
-          instance);
-
-    android::sp<ILight> service = ILight::getService(instance, true /* getStub */);
-
-    if (service.get() == nullptr) {
-        ALOGE("ILight::getService returned NULL, exiting");
-        return EXIT_FAILURE;
-    }
-
-    LOG_FATAL_IF(service->isRemote(), "Implementation is REMOTE!");
-
-    ALOGI("Registering instance %s.", instance);
-    service->registerAsService(instance);
-    ALOGI("Ready.");
-
-    ProcessState::self()->setThreadPoolMaxThreadCount(0);
-    ProcessState::self()->startThreadPool();
-    IPCThreadState::self()->joinThreadPool();
+    return defaultPassthroughServiceImplementation<ILight>("light");
 }