Pass JavaRef to Java methods in device/bluetooth.

device/bluetooth/bluetooth_remote_gatt_service_android.cc

Index: device/bluetooth/bluetooth_remote_gatt_service_android.cc
diff --git a/device/bluetooth/bluetooth_remote_gatt_service_android.cc b/device/bluetooth/bluetooth_remote_gatt_service_android.cc
index e26326de51b55a3694f0928b24e3d17eb11e3e9f..25087b733697c9bab9b56d0437bfcf121a425ae8 100644
--- a/device/bluetooth/bluetooth_remote_gatt_service_android.cc
+++ b/device/bluetooth/bluetooth_remote_gatt_service_android.cc
@@ -15,6 +15,7 @@
 
 using base::android::AttachCurrentThread;
 using base::android::JavaParamRef;
+using base::android::JavaRef;
 
 namespace device {
 
@@ -23,9 +24,10 @@ std::unique_ptr<BluetoothRemoteGattServiceAndroid>
 BluetoothRemoteGattServiceAndroid::Create(
     BluetoothAdapterAndroid* adapter,
     BluetoothDeviceAndroid* device,
-    jobject /* BluetoothGattServiceWrapper */ bluetooth_gatt_service_wrapper,
+    const JavaRef<jobject>&
+        bluetooth_gatt_service_wrapper,  // BluetoothGattServiceWrapper
     const std::string& instance_id,
-    jobject /* ChromeBluetoothDevice */ chrome_bluetooth_device) {
+    const JavaRef<jobject>& chrome_bluetooth_device) {  // ChromeBluetoothDevice
   std::unique_ptr<BluetoothRemoteGattServiceAndroid> service(
       new BluetoothRemoteGattServiceAndroid(adapter, device, instance_id));