Expose TxPower for bluetooth devices during discovery

device/bluetooth/bluetooth_device_win.cc

Index: device/bluetooth/bluetooth_device_win.cc
diff --git a/device/bluetooth/bluetooth_device_win.cc b/device/bluetooth/bluetooth_device_win.cc
index 0cd807145dcb3fd073913260a5f42bdb9a5de95f..de00817726eadf017ec4d293ccf1c81fa344d60d 100644
--- a/device/bluetooth/bluetooth_device_win.cc
+++ b/device/bluetooth/bluetooth_device_win.cc
@@ -192,6 +192,11 @@ int16 BluetoothDeviceWin::GetInquiryRSSI() const {
   return kUnknownPower;
 }
 
+int16 BluetoothDeviceWin::GetInquiryTxPower() const {
+  NOTIMPLEMENTED();
+  return kUnknownPower;
+}
+
 bool BluetoothDeviceWin::ExpectingPinCode() const {
   NOTIMPLEMENTED();
   return false;