diff --git a/Benchmark.h b/Benchmark.h
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--- /dev/null
+++ b/Benchmark.h
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+/*
+ * Copyright (C) 2015 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.
+ */
+
+#ifndef ANDROID_VOLD_BENCHMARK_H
+#define ANDROID_VOLD_BENCHMARK_H
+
+#include <utils/Errors.h>
+#include <utils/Timers.h>
+
+#include <string>
+
+namespace android {
+namespace vold {
+
+nsecs_t Benchmark(const std::string& path, const std::string& sysPath);
+
+}  // namespace vold
+}  // namespace android
+
+#endif