| Index: device/bluetooth/bluetooth_low_energy_device_mac.h
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| diff --git a/device/bluetooth/bluetooth_low_energy_device_mac.h b/device/bluetooth/bluetooth_low_energy_device_mac.h
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| index 123015cd5a684c225c18b57b1c0f2bd7985f9080..3101f13d8ac8f15baf9bd74fcf3bd3cb8cc58a3e 100644
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| --- a/device/bluetooth/bluetooth_low_energy_device_mac.h
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| +++ b/device/bluetooth/bluetooth_low_energy_device_mac.h
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| @@ -56,8 +56,8 @@ class DEVICE_BLUETOOTH_EXPORT BluetoothLowEnergyDeviceMac
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|    bool IsGattConnected() const override;
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|    bool IsConnectable() const override;
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|    bool IsConnecting() const override;
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| -  int16_t GetInquiryRSSI() const override;
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| -  int16_t GetInquiryTxPower() const override;
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| +  base::Optional<int8_t> GetInquiryRSSI() const override;
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| +  base::Optional<int8_t> GetInquiryTxPower() const override;
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|    bool ExpectingPinCode() const override;
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|    bool ExpectingPasskey() const override;
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|    bool ExpectingConfirmation() const override;
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| 
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