bluetooth: Make public BluetoothDevice::GetName method.

device/bluetooth/bluetooth_device_win.h

Index: device/bluetooth/bluetooth_device_win.h
diff --git a/device/bluetooth/bluetooth_device_win.h b/device/bluetooth/bluetooth_device_win.h
index 3533c81a8a57616a020776bd77037f47b564e216..4c43448638eb9ddeb5a63db1ee2ba5615b33a2e3 100644
--- a/device/bluetooth/bluetooth_device_win.h
+++ b/device/bluetooth/bluetooth_device_win.h
@@ -41,6 +41,7 @@ class DEVICE_BLUETOOTH_EXPORT BluetoothDeviceWin : public BluetoothDevice {
   uint16_t GetProductID() const override;
   uint16_t GetDeviceID() const override;
   uint16_t GetAppearance() const override;
+  base::Optional<std::string> GetName() const override;
   bool IsPaired() const override;
   bool IsConnected() const override;
   bool IsGattConnected() const override;
@@ -92,7 +93,6 @@ class DEVICE_BLUETOOTH_EXPORT BluetoothDeviceWin : public BluetoothDevice {
 
  protected:
   // BluetoothDevice override
-  std::string GetDeviceName() const override;
   void CreateGattConnectionImpl() override;
   void DisconnectGatt() override;
 
@@ -134,7 +134,7 @@ class DEVICE_BLUETOOTH_EXPORT BluetoothDeviceWin : public BluetoothDevice {
   uint32_t bluetooth_class_;
 
   // The name of the device, as supplied by the remote device.
-  std::string name_;
+  base::Optional<std::string> name_;
 
   // The Bluetooth address of the device.
   std::string address_;