Revert of Move //device/generic_sensor to be part of the internal implementation of the Device Service.

device/generic_sensor/android/sensors_jni_registrar.h

Index: device/generic_sensor/android/sensors_jni_registrar.h
diff --git a/device/generic_sensor/android/sensors_jni_registrar.h b/device/generic_sensor/android/sensors_jni_registrar.h
new file mode 100644
index 0000000000000000000000000000000000000000..e10738d61601a771a113dab4c5ee8d657033e734
--- /dev/null
+++ b/device/generic_sensor/android/sensors_jni_registrar.h
@@ -0,0 +1,24 @@
+// Copyright 2016 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 DEVICE_GENERIC_SENSOR_ANDROID_SENSORS_JNI_REGISTRAR_H_
+#define DEVICE_GENERIC_SENSOR_ANDROID_SENSORS_JNI_REGISTRAR_H_
+
+#include <jni.h>
+
+#include "device/generic_sensor/generic_sensor_export.h"
+
+namespace device {
+namespace android {
+
+// Registers C++ methods in device/generic_sensor classes with JNI.
+// See https://www.chromium.org/developers/design-documents/android-jni
+//
+// Must be called before classes in the Sensors module are used.
+bool DEVICE_GENERIC_SENSOR_EXPORT RegisterSensorsJni(JNIEnv* env);
+
+}  // namespace android
+}  // namespace device
+
+#endif  // DEVICE_GENERIC_SENSOR_ANDROID_SENSORS_JNI_REGISTRAR_H_